diff --git a/erpnext/accounts/doctype/c_form/c_form.py b/erpnext/accounts/doctype/c_form/c_form.py
index fd86ed4..cfe28f3 100644
--- a/erpnext/accounts/doctype/c_form/c_form.py
+++ b/erpnext/accounts/doctype/c_form/c_form.py
@@ -54,7 +54,7 @@
 			frappe.throw(_("Please enter atleast 1 invoice in the table"))
 
 	def set_total_invoiced_amount(self):
-		total = sum([flt(d.grand_total) for d in self.get('invoices')])
+		total = sum(flt(d.grand_total) for d in self.get('invoices'))
 		frappe.db.set(self, 'total_invoiced_amount', total)
 
 	@frappe.whitelist()
diff --git a/erpnext/accounts/doctype/coupon_code/coupon_code.py b/erpnext/accounts/doctype/coupon_code/coupon_code.py
index 7829c93..55c1193 100644
--- a/erpnext/accounts/doctype/coupon_code/coupon_code.py
+++ b/erpnext/accounts/doctype/coupon_code/coupon_code.py
@@ -14,7 +14,7 @@
 
 		if not self.coupon_code:
 			if self.coupon_type == "Promotional":
-				self.coupon_code =''.join([i for i in self.coupon_name if not i.isdigit()])[0:8].upper()
+				self.coupon_code =''.join(i for i in self.coupon_name if not i.isdigit())[0:8].upper()
 			elif self.coupon_type == "Gift Card":
 				self.coupon_code = frappe.generate_hash()[:10].upper()
 		
diff --git a/erpnext/accounts/doctype/invoice_discounting/invoice_discounting.py b/erpnext/accounts/doctype/invoice_discounting/invoice_discounting.py
index 95d2ee5..b73d8bf 100644
--- a/erpnext/accounts/doctype/invoice_discounting/invoice_discounting.py
+++ b/erpnext/accounts/doctype/invoice_discounting/invoice_discounting.py
@@ -42,7 +42,7 @@
 					record.idx, frappe.bold(actual_outstanding), frappe.bold(record.sales_invoice)))
 
 	def calculate_total_amount(self):
-		self.total_amount = sum([flt(d.outstanding_amount) for d in self.invoices])
+		self.total_amount = sum(flt(d.outstanding_amount) for d in self.invoices)
 
 	def on_submit(self):
 		self.update_sales_invoice()
diff --git a/erpnext/accounts/doctype/journal_entry/journal_entry.py b/erpnext/accounts/doctype/journal_entry/journal_entry.py
index ed1bd28..937597b 100644
--- a/erpnext/accounts/doctype/journal_entry/journal_entry.py
+++ b/erpnext/accounts/doctype/journal_entry/journal_entry.py
@@ -196,8 +196,8 @@
 					frappe.throw(_("Row {0}: Party Type and Party is required for Receivable / Payable account {1}").format(d.idx, d.account))
 
 	def check_credit_limit(self):
-		customers = list(set([d.party for d in self.get("accounts")
-			if d.party_type=="Customer" and d.party and flt(d.debit) > 0]))
+		customers = list(set(d.party for d in self.get("accounts")
+			if d.party_type=="Customer" and d.party and flt(d.debit) > 0))
 		if customers:
 			from erpnext.selling.doctype.customer.customer import check_credit_limit
 			for customer in customers:
diff --git a/erpnext/accounts/doctype/monthly_distribution/monthly_distribution.py b/erpnext/accounts/doctype/monthly_distribution/monthly_distribution.py
index 88667d7..bff6422 100644
--- a/erpnext/accounts/doctype/monthly_distribution/monthly_distribution.py
+++ b/erpnext/accounts/doctype/monthly_distribution/monthly_distribution.py
@@ -21,7 +21,7 @@
 			idx += 1
 
 	def validate(self):
-		total = sum([flt(d.percentage_allocation) for d in self.get("percentages")])
+		total = sum(flt(d.percentage_allocation) for d in self.get("percentages"))
 
 		if flt(total, 2) != 100.0:
 			frappe.throw(_("Percentage Allocation should be equal to 100%") + \
diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index edca210..2c6deb3 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -309,7 +309,7 @@
 		for k, v in no_oustanding_refs.items():
 			frappe.msgprint(
 				_("{} - {} now have {} as they had no outstanding amount left before submitting the Payment Entry.")
-					.format(k, frappe.bold(", ".join([d.reference_name for d in v])), frappe.bold("negative outstanding amount"))
+					.format(k, frappe.bold(", ".join(d.reference_name for d in v)), frappe.bold("negative outstanding amount"))
 				+ "<br><br>" + _("If this is undesirable please cancel the corresponding Payment Entry."),
 				title=_("Warning"), indicator="orange")
 
@@ -524,7 +524,7 @@
 	def set_unallocated_amount(self):
 		self.unallocated_amount = 0
 		if self.party:
-			total_deductions = sum([flt(d.amount) for d in self.get("deductions")])
+			total_deductions = sum(flt(d.amount) for d in self.get("deductions"))
 			if self.payment_type == "Receive" \
 				and self.base_total_allocated_amount < self.base_received_amount_after_tax + total_deductions \
 				and self.total_allocated_amount < self.paid_amount_after_tax + (total_deductions / self.source_exchange_rate):
@@ -549,7 +549,7 @@
 		else:
 			self.difference_amount = self.base_paid_amount_after_tax - flt(self.base_received_amount_after_tax)
 
-		total_deductions = sum([flt(d.amount) for d in self.get("deductions")])
+		total_deductions = sum(flt(d.amount) for d in self.get("deductions"))
 
 		self.difference_amount = flt(self.difference_amount - total_deductions,
 			self.precision("difference_amount"))
@@ -565,8 +565,8 @@
 		if ((self.payment_type=="Pay" and self.party_type=="Customer")
 				or (self.payment_type=="Receive" and self.party_type=="Supplier")):
 
-			total_negative_outstanding = sum([abs(flt(d.outstanding_amount))
-				for d in self.get("references") if flt(d.outstanding_amount) < 0])
+			total_negative_outstanding = sum(abs(flt(d.outstanding_amount))
+				for d in self.get("references") if flt(d.outstanding_amount) < 0)
 
 			paid_amount = self.paid_amount if self.payment_type=="Receive" else self.received_amount
 			additional_charges = sum([flt(d.amount) for d in self.deductions])
diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index 4689787..438951d 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -112,7 +112,7 @@
 		if not data_of_completed_requests:
 			return self.grand_total
 
-		request_amounts = sum([json.loads(d).get('request_amount') for d in data_of_completed_requests])
+		request_amounts = sum(json.loads(d).get('request_amount') for d in data_of_completed_requests)
 		return request_amounts
 
 	def on_cancel(self):
diff --git a/erpnext/accounts/doctype/pricing_rule/utils.py b/erpnext/accounts/doctype/pricing_rule/utils.py
index d23b952..b54d0e7 100644
--- a/erpnext/accounts/doctype/pricing_rule/utils.py
+++ b/erpnext/accounts/doctype/pricing_rule/utils.py
@@ -20,9 +20,9 @@
 class MultiplePricingRuleConflict(frappe.ValidationError): pass
 
 apply_on_table = {
-    'Item Code': 'items',
-    'Item Group': 'item_groups',
-    'Brand': 'brands'
+	'Item Code': 'items',
+	'Item Group': 'item_groups',
+	'Brand': 'brands'
 }
 
 def get_pricing_rules(args, doc=None):
@@ -183,7 +183,7 @@
 			condition = "ifnull({table}.{field}, '') in ({parent_groups})".format(
 				table=table,
 				field=field,
-				parent_groups=", ".join([frappe.db.escape(d) for d in parent_groups])
+				parent_groups=", ".join(frappe.db.escape(d) for d in parent_groups)
 			)
 
 			frappe.flags.tree_conditions[key] = condition
@@ -264,7 +264,7 @@
 
 	# find pricing rule with highest priority
 	if pricing_rules:
-		max_priority = max([cint(p.priority) for p in pricing_rules])
+		max_priority = max(cint(p.priority) for p in pricing_rules)
 		if max_priority:
 			pricing_rules = list(filter(lambda x: cint(x.priority)==max_priority, pricing_rules))
 
@@ -272,14 +272,14 @@
 		pricing_rules = list(pricing_rules)
 
 	if len(pricing_rules) > 1:
-		rate_or_discount = list(set([d.rate_or_discount for d in pricing_rules]))
+		rate_or_discount = list(set(d.rate_or_discount for d in pricing_rules))
 		if len(rate_or_discount) == 1 and rate_or_discount[0] == "Discount Percentage":
 			pricing_rules = list(filter(lambda x: x.for_price_list==args.price_list, pricing_rules)) \
 				or pricing_rules
 
 	if len(pricing_rules) > 1 and not args.for_shopping_cart:
 		frappe.throw(_("Multiple Price Rules exists with same criteria, please resolve conflict by assigning priority. Price Rules: {0}")
-			.format("\n".join([d.name for d in pricing_rules])), MultiplePricingRuleConflict)
+			.format("\n".join(d.name for d in pricing_rules)), MultiplePricingRuleConflict)
 	elif pricing_rules:
 		return pricing_rules[0]
 
@@ -541,7 +541,7 @@
 
 def apply_pricing_rule_for_free_items(doc, pricing_rule_args, set_missing_values=False):
 	if pricing_rule_args:
-		items = tuple([(d.item_code, d.pricing_rules) for d in doc.items if d.is_free_item])
+		items = tuple((d.item_code, d.pricing_rules) for d in doc.items if d.is_free_item)
 
 		for args in pricing_rule_args:
 			if not items or (args.get('item_code'), args.get('pricing_rules')) not in items:
@@ -589,4 +589,4 @@
 		elif transaction_type=='cancelled':
 			if coupon.used>0:
 				coupon.used=coupon.used-1
-				coupon.save(ignore_permissions=True)
\ No newline at end of file
+				coupon.save(ignore_permissions=True)
diff --git a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
index 723d151..503dda7 100644
--- a/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py
@@ -632,7 +632,7 @@
 
 		self.assertEqual(len(pi.get("supplied_items")), 2)
 
-		rm_supp_cost = sum([d.amount for d in pi.get("supplied_items")])
+		rm_supp_cost = sum(d.amount for d in pi.get("supplied_items"))
 		self.assertEqual(flt(pi.get("items")[0].rm_supp_cost, 2), flt(rm_supp_cost, 2))
 
 	def test_rejected_serial_no(self):
diff --git a/erpnext/accounts/doctype/tax_withholding_category/test_tax_withholding_category.py b/erpnext/accounts/doctype/tax_withholding_category/test_tax_withholding_category.py
index 0cea761..dd26be7 100644
--- a/erpnext/accounts/doctype/tax_withholding_category/test_tax_withholding_category.py
+++ b/erpnext/accounts/doctype/tax_withholding_category/test_tax_withholding_category.py
@@ -112,7 +112,7 @@
 		si = create_sales_invoice(customer = "Test TCS Customer", rate=5000)
 		si.submit()
 
-		tcs_charged = sum([d.base_tax_amount for d in si.taxes if d.account_head == 'TCS - _TC'])
+		tcs_charged = sum(d.base_tax_amount for d in si.taxes if d.account_head == 'TCS - _TC')
 		self.assertEqual(tcs_charged, 500)
 		invoices.append(si)
 
diff --git a/erpnext/accounts/general_ledger.py b/erpnext/accounts/general_ledger.py
index d4b2494..59009ae 100644
--- a/erpnext/accounts/general_ledger.py
+++ b/erpnext/accounts/general_ledger.py
@@ -143,7 +143,7 @@
 		validate_expense_against_budget(args)
 
 def validate_cwip_accounts(gl_map):
-	cwip_enabled = any([cint(ac.enable_cwip_accounting) for ac in frappe.db.get_all("Asset Category","enable_cwip_accounting")])
+	cwip_enabled = any(cint(ac.enable_cwip_accounting) for ac in frappe.db.get_all("Asset Category","enable_cwip_accounting"))
 
 	if cwip_enabled and gl_map[0].voucher_type == "Journal Entry":
 			cwip_accounts = [d[0] for d in frappe.db.sql("""select name from tabAccount
diff --git a/erpnext/accounts/report/cash_flow/custom_cash_flow.py b/erpnext/accounts/report/cash_flow/custom_cash_flow.py
index ff87276..c11c153 100644
--- a/erpnext/accounts/report/cash_flow/custom_cash_flow.py
+++ b/erpnext/accounts/report/cash_flow/custom_cash_flow.py
@@ -32,7 +32,7 @@
 		join `tabCash Flow Mapping` cfm on cfma.parent=cfm.name
 		where cfma.parent in (%s)
 		order by cfm.is_working_capital
-	''', (', '.join(['"%s"' % d for d in mapping_names])))
+	''', (', '.join('"%s"' % d for d in mapping_names)))
 
 
 def setup_mappers(mappers):
@@ -83,8 +83,8 @@
 
 		account_types_labels = sorted(
 			set(
-				[(d['label'], d['is_working_capital'], d['is_income_tax_liability'], d['is_income_tax_expense'])
-					for d in account_types]
+				(d['label'], d['is_working_capital'], d['is_income_tax_liability'], d['is_income_tax_expense'])
+					for d in account_types
 			),
 			key=lambda x: x[1]
 		)
@@ -375,7 +375,7 @@
 	total = 0
 	for period in period_list:
 		start_date = get_start_date(period, accumulated_values, company)
-		accounts = ', '.join(['"%s"' % d for d in account_names])
+		accounts = ', '.join('"%s"' % d for d in account_names)
 
 		if opening_balances:
 			date_info = dict(date=start_date)
diff --git a/erpnext/accounts/report/customer_ledger_summary/customer_ledger_summary.py b/erpnext/accounts/report/customer_ledger_summary/customer_ledger_summary.py
index 10b32fe..c79d740 100644
--- a/erpnext/accounts/report/customer_ledger_summary/customer_ledger_summary.py
+++ b/erpnext/accounts/report/customer_ledger_summary/customer_ledger_summary.py
@@ -145,7 +145,7 @@
 		out = []
 		for party, row in iteritems(self.party_data):
 			if row.opening_balance or row.invoiced_amount or row.paid_amount or row.return_amount or row.closing_amount:
-				total_party_adjustment = sum([amount for amount in itervalues(self.party_adjustment_details.get(party, {}))])
+				total_party_adjustment = sum(amount for amount in itervalues(self.party_adjustment_details.get(party, {})))
 				row.paid_amount -= total_party_adjustment
 
 				adjustments = self.party_adjustment_details.get(party, {})
diff --git a/erpnext/accounts/report/financial_statements.py b/erpnext/accounts/report/financial_statements.py
index d20ddbd..39ff804 100644
--- a/erpnext/accounts/report/financial_statements.py
+++ b/erpnext/accounts/report/financial_statements.py
@@ -369,7 +369,7 @@
 
 	if accounts:
 		additional_conditions += " and account in ({})"\
-			.format(", ".join([frappe.db.escape(d) for d in accounts]))
+			.format(", ".join(frappe.db.escape(d) for d in accounts))
 
 		gl_filters = {
 			"company": company,
diff --git a/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py b/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
index cb4d9b4..685419a 100644
--- a/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
+++ b/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
@@ -334,7 +334,7 @@
 
 def get_purchase_receipts_against_purchase_order(item_list):
 	po_pr_map = frappe._dict()
-	po_item_rows = list(set([d.po_detail for d in item_list]))
+	po_item_rows = list(set(d.po_detail for d in item_list))
 
 	if po_item_rows:
 		purchase_receipts = frappe.db.sql("""
diff --git a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
index 928b373..2e794da 100644
--- a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
+++ b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
@@ -23,7 +23,7 @@
 	if item_list:
 		itemised_tax, tax_columns = get_tax_accounts(item_list, columns, company_currency)
 
-	mode_of_payments = get_mode_of_payments(set([d.parent for d in item_list]))
+	mode_of_payments = get_mode_of_payments(set(d.parent for d in item_list))
 	so_dn_map = get_delivery_notes_against_sales_order(item_list)
 
 	data = []
diff --git a/erpnext/accounts/report/pos_register/pos_register.py b/erpnext/accounts/report/pos_register/pos_register.py
index cfbd7fd..6a42bb4 100644
--- a/erpnext/accounts/report/pos_register/pos_register.py
+++ b/erpnext/accounts/report/pos_register/pos_register.py
@@ -77,14 +77,14 @@
 		), filters, as_dict=1)
 
 def concat_mode_of_payments(pos_entries):
-	mode_of_payments = get_mode_of_payments(set([d.pos_invoice for d in pos_entries]))
+	mode_of_payments = get_mode_of_payments(set(d.pos_invoice for d in pos_entries))
 	for entry in pos_entries:
 		if mode_of_payments.get(entry.pos_invoice):
 			entry.mode_of_payment = ", ".join(mode_of_payments.get(entry.pos_invoice, []))
 
 def add_subtotal_row(data, group_invoices, group_by_field, group_by_value):
-	grand_total = sum([d.grand_total for d in group_invoices])
-	paid_amount = sum([d.paid_amount for d in group_invoices])
+	grand_total = sum(d.grand_total for d in group_invoices)
+	paid_amount = sum(d.paid_amount for d in group_invoices)
 	data.append({
 		group_by_field: group_by_value,
 		"grand_total": grand_total,
diff --git a/erpnext/accounts/report/purchase_register/purchase_register.py b/erpnext/accounts/report/purchase_register/purchase_register.py
index 8ac749d..10edd41 100644
--- a/erpnext/accounts/report/purchase_register/purchase_register.py
+++ b/erpnext/accounts/report/purchase_register/purchase_register.py
@@ -26,7 +26,7 @@
 	invoice_expense_map, invoice_tax_map = get_invoice_tax_map(invoice_list,
 		invoice_expense_map, expense_accounts)
 	invoice_po_pr_map = get_invoice_po_pr_map(invoice_list)
-	suppliers = list(set([d.supplier for d in invoice_list]))
+	suppliers = list(set(d.supplier for d in invoice_list))
 	supplier_details = get_supplier_details(suppliers)
 
 	company_currency = frappe.get_cached_value('Company',  filters.company,  "default_currency")
@@ -120,13 +120,13 @@
 			and docstatus = 1 and (account_head is not null and account_head != '')
 			and category in ('Total', 'Valuation and Total')
 			and parent in (%s) order by account_head""" %
-			', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]))
+			', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list))
 
 		unrealized_profit_loss_accounts = frappe.db.sql_list("""SELECT distinct unrealized_profit_loss_account
 			from `tabPurchase Invoice` where docstatus = 1 and name in (%s)
 			and ifnull(unrealized_profit_loss_account, '') != ''
 			order by unrealized_profit_loss_account""" %
-			', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]))
+			', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list))
 
 	expense_columns = [(account + ":Currency/currency:120") for account in expense_accounts]
 	unrealized_profit_loss_account_columns = [(account + ":Currency/currency:120") for account in unrealized_profit_loss_accounts]
@@ -208,7 +208,7 @@
 		from `tabPurchase Invoice Item`
 		where parent in (%s)
 		group by parent, expense_account
-	""" % ', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+	""" % ', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_expense_map = {}
 	for d in expense_details:
@@ -221,7 +221,7 @@
 	unrealized_amount_details = frappe.db.sql("""SELECT name, unrealized_profit_loss_account,
 		base_net_total as amount from `tabPurchase Invoice` where name in (%s)
 		and is_internal_supplier = 1 and company = represents_company""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	internal_invoice_map = {}
 	for d in unrealized_amount_details:
@@ -238,7 +238,7 @@
 		where parent in (%s) and category in ('Total', 'Valuation and Total')
 			and base_tax_amount_after_discount_amount != 0
 		group by parent, account_head, add_deduct_tax
-	""" % ', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+	""" % ', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_tax_map = {}
 	for d in tax_details:
@@ -258,7 +258,7 @@
 		select parent, purchase_order, purchase_receipt, po_detail, project
 		from `tabPurchase Invoice Item`
 		where parent in (%s)
-	""" % ', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+	""" % ', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_po_pr_map = {}
 	for d in pi_items:
diff --git a/erpnext/accounts/report/sales_payment_summary/sales_payment_summary.py b/erpnext/accounts/report/sales_payment_summary/sales_payment_summary.py
index c234da0..ff77468 100644
--- a/erpnext/accounts/report/sales_payment_summary/sales_payment_summary.py
+++ b/erpnext/accounts/report/sales_payment_summary/sales_payment_summary.py
@@ -158,7 +158,7 @@
 def get_mode_of_payments(filters):
 	mode_of_payments = {}
 	invoice_list = get_invoices(filters)
-	invoice_list_names = ",".join(['"' + invoice['name'] + '"' for invoice in invoice_list])
+	invoice_list_names = ",".join('"' + invoice['name'] + '"' for invoice in invoice_list)
 	if invoice_list:
 		inv_mop = frappe.db.sql("""select a.owner,a.posting_date, ifnull(b.mode_of_payment, '') as mode_of_payment
 			from `tabSales Invoice` a, `tabSales Invoice Payment` b
@@ -197,7 +197,7 @@
 def get_mode_of_payment_details(filters):
 	mode_of_payment_details = {}
 	invoice_list = get_invoices(filters)
-	invoice_list_names = ",".join(['"' + invoice['name'] + '"' for invoice in invoice_list])
+	invoice_list_names = ",".join('"' + invoice['name'] + '"' for invoice in invoice_list)
 	if invoice_list:
 		inv_mop_detail = frappe.db.sql("""select a.owner, a.posting_date,
 			ifnull(b.mode_of_payment, '') as mode_of_payment, sum(b.base_amount) as paid_amount
diff --git a/erpnext/accounts/report/sales_register/sales_register.py b/erpnext/accounts/report/sales_register/sales_register.py
index cb2c98b..9099593 100644
--- a/erpnext/accounts/report/sales_register/sales_register.py
+++ b/erpnext/accounts/report/sales_register/sales_register.py
@@ -248,19 +248,19 @@
 		income_accounts = frappe.db.sql_list("""select distinct income_account
 			from `tabSales Invoice Item` where docstatus = 1 and parent in (%s)
 			order by income_account""" %
-			', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]))
+			', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list))
 
 		tax_accounts = 	frappe.db.sql_list("""select distinct account_head
 			from `tabSales Taxes and Charges` where parenttype = 'Sales Invoice'
 			and docstatus = 1 and base_tax_amount_after_discount_amount != 0
 			and parent in (%s) order by account_head""" %
-			', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]))
+			', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list))
 
 		unrealized_profit_loss_accounts = frappe.db.sql_list("""SELECT distinct unrealized_profit_loss_account
 			from `tabSales Invoice` where docstatus = 1 and name in (%s)
 			and ifnull(unrealized_profit_loss_account, '') != ''
 			order by unrealized_profit_loss_account""" %
-			', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]))
+			', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list))
 
 	for account in income_accounts:
 		income_columns.append({
@@ -406,7 +406,7 @@
 def get_invoice_income_map(invoice_list):
 	income_details = frappe.db.sql("""select parent, income_account, sum(base_net_amount) as amount
 		from `tabSales Invoice Item` where parent in (%s) group by parent, income_account""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_income_map = {}
 	for d in income_details:
@@ -419,7 +419,7 @@
 	unrealized_amount_details = frappe.db.sql("""SELECT name, unrealized_profit_loss_account,
 		base_net_total as amount from `tabSales Invoice` where name in (%s)
 		and is_internal_customer = 1 and company = represents_company""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	internal_invoice_map = {}
 	for d in unrealized_amount_details:
@@ -432,7 +432,7 @@
 	tax_details = frappe.db.sql("""select parent, account_head,
 		sum(base_tax_amount_after_discount_amount) as tax_amount
 		from `tabSales Taxes and Charges` where parent in (%s) group by parent, account_head""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_tax_map = {}
 	for d in tax_details:
@@ -451,7 +451,7 @@
 	si_items = frappe.db.sql("""select parent, sales_order, delivery_note, so_detail
 		from `tabSales Invoice Item` where parent in (%s)
 		and (ifnull(sales_order, '') != '' or ifnull(delivery_note, '') != '')""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_so_dn_map = {}
 	for d in si_items:
@@ -475,7 +475,7 @@
 	si_items = frappe.db.sql("""select parent, cost_center, warehouse
 		from `tabSales Invoice Item` where parent in (%s)
 		and (ifnull(cost_center, '') != '' or ifnull(warehouse, '') != '')""" %
-		', '.join(['%s']*len(invoice_list)), tuple([inv.name for inv in invoice_list]), as_dict=1)
+		', '.join(['%s']*len(invoice_list)), tuple(inv.name for inv in invoice_list), as_dict=1)
 
 	invoice_cc_wh_map = {}
 	for d in si_items:
diff --git a/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py b/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
index a8280c1..e15715d 100644
--- a/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
+++ b/erpnext/accounts/report/tds_computation_summary/tds_computation_summary.py
@@ -78,7 +78,7 @@
 			and company=%s and posting_date between %s and %s
 	""", (supplier, company, from_date, to_date), as_dict=1)
 
-	supplier_credit_amount = flt(sum([d.credit for d in entries]))
+	supplier_credit_amount = flt(sum(d.credit for d in entries))
 
 	vouchers = [d.voucher_no for d in entries]
 	vouchers += get_advance_vouchers([supplier], company=company,
@@ -91,7 +91,7 @@
 			from `tabGL Entry`
 			where account=%s and posting_date between %s and %s
 				and company=%s and credit > 0 and voucher_no in ({0})
-		""".format(', '.join(["'%s'" % d for d in vouchers])),
+		""".format(', '.join("'%s'" % d for d in vouchers)),
 			(account, from_date, to_date, company))[0][0])
 
 	date_range_filter = [fiscal_year, from_date, to_date]
diff --git a/erpnext/accounts/report/utils.py b/erpnext/accounts/report/utils.py
index b020d0a..ba461ed 100644
--- a/erpnext/accounts/report/utils.py
+++ b/erpnext/accounts/report/utils.py
@@ -139,6 +139,6 @@
 	gross_profit_data = GrossProfitGenerator(filters)
 	result = gross_profit_data.grouped_data
 	if not with_item_data:
-		result = sum([d.gross_profit for d in result])
+		result = sum(d.gross_profit for d in result)
 
 	return result
diff --git a/erpnext/accounts/utils.py b/erpnext/accounts/utils.py
index 5a64e27..66a9b60 100644
--- a/erpnext/accounts/utils.py
+++ b/erpnext/accounts/utils.py
@@ -635,7 +635,7 @@
 			'select name from `tabPurchase Invoice` where release_date IS NOT NULL and release_date > CURDATE()',
 			as_dict=1
 		)
-		held_invoices = set([d['name'] for d in held_invoices])
+		held_invoices = set(d['name'] for d in held_invoices)
 
 	return held_invoices
 
diff --git a/erpnext/assets/doctype/asset/test_asset.py b/erpnext/assets/doctype/asset/test_asset.py
index 3cd4b80..8845f24 100644
--- a/erpnext/assets/doctype/asset/test_asset.py
+++ b/erpnext/assets/doctype/asset/test_asset.py
@@ -470,7 +470,7 @@
 		})
 		asset.insert()
 		accumulated_depreciation_after_full_schedule = \
-			max([d.accumulated_depreciation_amount for d in asset.get("schedules")])
+			max(d.accumulated_depreciation_amount for d in asset.get("schedules"))
 
 		asset_value_after_full_schedule = (flt(asset.gross_purchase_amount) -
 			flt(accumulated_depreciation_after_full_schedule))
diff --git a/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.py b/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.py
index 1430827..2f6b5ee 100644
--- a/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.py
+++ b/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.py
@@ -92,7 +92,7 @@
 			d.value_after_depreciation = asset_value
 
 			if d.depreciation_method in ("Straight Line", "Manual"):
-				end_date = max([s.schedule_date for s in asset.schedules if cint(s.finance_book_id) == d.idx])
+				end_date = max(s.schedule_date for s in asset.schedules if cint(s.finance_book_id) == d.idx)
 				total_days = date_diff(end_date, self.date)
 				rate_per_day = flt(d.value_after_depreciation) / flt(total_days)
 				from_date = self.date
diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index 782593a..2629ba7 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -139,7 +139,7 @@
 
 	def validate_minimum_order_qty(self):
 		if not self.get("items"): return
-		items = list(set([d.item_code for d in self.get("items")]))
+		items = list(set(d.item_code for d in self.get("items")))
 
 		itemwise_min_order_qty = frappe._dict(frappe.db.sql("""select name, min_order_qty
 			from tabItem where name in ({0})""".format(", ".join(["%s"] * len(items))), items))
@@ -326,10 +326,10 @@
 			so.notify_update()
 
 	def has_drop_ship_item(self):
-		return any([d.delivered_by_supplier for d in self.items])
+		return any(d.delivered_by_supplier for d in self.items)
 
 	def is_against_so(self):
-		return any([d.sales_order for d in self.items if d.sales_order])
+		return any(d.sales_order for d in self.items if d.sales_order)
 
 	def set_received_qty_for_drop_ship_items(self):
 		for item in self.items:
diff --git a/erpnext/buying/doctype/purchase_order/test_purchase_order.py b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
index 3917196..3b9f8e9 100644
--- a/erpnext/buying/doctype/purchase_order/test_purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/test_purchase_order.py
@@ -359,7 +359,7 @@
 		update_child_qty_rate('Purchase Order', trans_item, po.name)
 		po.reload()
 
-		total_reqd_qty_after_change = sum([d.get("required_qty") for d in po.as_dict().get("supplied_items")])
+		total_reqd_qty_after_change = sum(d.get("required_qty") for d in po.as_dict().get("supplied_items"))
 
 		self.assertEqual(total_reqd_qty_after_change, 2 * total_reqd_qty)
 
diff --git a/erpnext/buying/doctype/request_for_quotation/request_for_quotation.py b/erpnext/buying/doctype/request_for_quotation/request_for_quotation.py
index 180ba93..0127eb8 100644
--- a/erpnext/buying/doctype/request_for_quotation/request_for_quotation.py
+++ b/erpnext/buying/doctype/request_for_quotation/request_for_quotation.py
@@ -391,7 +391,7 @@
 def get_supplier_tag():
 	if not frappe.cache().hget("Supplier", "Tags"):
 		filters = {"document_type": "Supplier"}
-		tags = list(set([tag.tag for tag in frappe.get_all("Tag Link", filters=filters, fields=["tag"]) if tag]))
+		tags = list(set(tag.tag for tag in frappe.get_all("Tag Link", filters=filters, fields=["tag"]) if tag))
 		frappe.cache().hset("Supplier", "Tags", tags)
 
 	return frappe.cache().hget("Supplier", "Tags")
diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index 53ded33..7c6061d 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -610,8 +610,8 @@
 			order_field = "purchase_order"
 			order_doctype = "Purchase Order"
 
-		order_list = list(set([d.get(order_field)
-			for d in self.get("items") if d.get(order_field)]))
+		order_list = list(set(d.get(order_field)
+			for d in self.get("items") if d.get(order_field)))
 
 		journal_entries = get_advance_journal_entries(party_type, party, party_account,
 			amount_field, order_doctype, order_list, include_unallocated)
@@ -635,8 +635,8 @@
 
 	def validate_advance_entries(self):
 		order_field = "sales_order" if self.doctype == "Sales Invoice" else "purchase_order"
-		order_list = list(set([d.get(order_field)
-			for d in self.get("items") if d.get(order_field)]))
+		order_list = list(set(d.get(order_field)
+			for d in self.get("items") if d.get(order_field)))
 
 		if not order_list: return
 
diff --git a/erpnext/controllers/buying_controller.py b/erpnext/controllers/buying_controller.py
index 3f2d339..da81911 100644
--- a/erpnext/controllers/buying_controller.py
+++ b/erpnext/controllers/buying_controller.py
@@ -181,8 +181,8 @@
 				stock_and_asset_items_amount += flt(d.base_net_amount)
 				last_item_idx = d.idx
 
-		total_valuation_amount = sum([flt(d.base_tax_amount_after_discount_amount) for d in self.get("taxes")
-			if d.category in ["Valuation", "Valuation and Total"]])
+		total_valuation_amount = sum(flt(d.base_tax_amount_after_discount_amount) for d in self.get("taxes")
+			if d.category in ["Valuation", "Valuation and Total"])
 
 		valuation_amount_adjustment = total_valuation_amount
 		for i, item in enumerate(self.get("items")):
@@ -325,7 +325,7 @@
 	def update_raw_materials_supplied_based_on_stock_entries(self):
 		self.set('supplied_items', [])
 
-		purchase_orders = set([d.purchase_order for d in self.items])
+		purchase_orders = set(d.purchase_order for d in self.items)
 
 		# qty of raw materials backflushed (for each item per purchase order)
 		backflushed_raw_materials_map = get_backflushed_subcontracted_raw_materials(purchase_orders)
diff --git a/erpnext/controllers/queries.py b/erpnext/controllers/queries.py
index 81ac234..7bd739a 100644
--- a/erpnext/controllers/queries.py
+++ b/erpnext/controllers/queries.py
@@ -88,7 +88,7 @@
 	fields = get_fields("Customer", fields)
 
 	searchfields = frappe.get_meta("Customer").get_search_fields()
-	searchfields = " or ".join([field + " like %(txt)s" for field in searchfields])
+	searchfields = " or ".join(field + " like %(txt)s" for field in searchfields)
 
 	return frappe.db.sql("""select {fields} from `tabCustomer`
 		where docstatus < 2
diff --git a/erpnext/controllers/selling_controller.py b/erpnext/controllers/selling_controller.py
index 54156f37..7f28289 100644
--- a/erpnext/controllers/selling_controller.py
+++ b/erpnext/controllers/selling_controller.py
@@ -428,7 +428,7 @@
 		self.po_no = ', '.join(list(set(x.strip() for x in ','.join(po_nos).split(','))))
 
 	def get_po_nos(self, ref_doctype, ref_fieldname, po_nos):
-		doc_list = list(set([d.get(ref_fieldname) for d in self.items if d.get(ref_fieldname)]))
+		doc_list = list(set(d.get(ref_fieldname) for d in self.items if d.get(ref_fieldname)))
 		if doc_list:
 			po_nos += [d.po_no for d in frappe.get_all(ref_doctype, 'po_no', filters = {'name': ('in', doc_list)}) if d.get('po_no')]
 
diff --git a/erpnext/controllers/status_updater.py b/erpnext/controllers/status_updater.py
index 83d4c33..943f7aa 100644
--- a/erpnext/controllers/status_updater.py
+++ b/erpnext/controllers/status_updater.py
@@ -299,8 +299,8 @@
 			args['name'] = self.get(args['percent_join_field_parent'])
 			self._update_percent_field(args, update_modified)
 		else:
-			distinct_transactions = set([d.get(args['percent_join_field'])
-				for d in self.get_all_children(args['source_dt'])])
+			distinct_transactions = set(d.get(args['percent_join_field'])
+				for d in self.get_all_children(args['source_dt']))
 
 			for name in distinct_transactions:
 				if name:
diff --git a/erpnext/controllers/stock_controller.py b/erpnext/controllers/stock_controller.py
index 0da723d..9c29b00 100644
--- a/erpnext/controllers/stock_controller.py
+++ b/erpnext/controllers/stock_controller.py
@@ -313,7 +313,7 @@
 
 	def get_serialized_items(self):
 		serialized_items = []
-		item_codes = list(set([d.item_code for d in self.get("items")]))
+		item_codes = list(set(d.item_code for d in self.get("items")))
 		if item_codes:
 			serialized_items = frappe.db.sql_list("""select name from `tabItem`
 				where has_serial_no=1 and name in ({})""".format(", ".join(["%s"]*len(item_codes))),
@@ -324,8 +324,8 @@
 	def validate_warehouse(self):
 		from erpnext.stock.utils import validate_disabled_warehouse, validate_warehouse_company
 
-		warehouses = list(set([d.warehouse for d in
-			self.get("items") if getattr(d, "warehouse", None)]))
+		warehouses = list(set(d.warehouse for d in
+			self.get("items") if getattr(d, "warehouse", None)))
 
 		target_warehouses = list(set([d.target_warehouse for d in
 			self.get("items") if getattr(d, "target_warehouse", None)]))
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index 0b4fb3a..2bb83ea 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -378,10 +378,10 @@
 
 	def manipulate_grand_total_for_inclusive_tax(self):
 		# if fully inclusive taxes and diff
-		if self.doc.get("taxes") and any([cint(t.included_in_print_rate) for t in self.doc.get("taxes")]):
+		if self.doc.get("taxes") and any(cint(t.included_in_print_rate) for t in self.doc.get("taxes")):
 			last_tax = self.doc.get("taxes")[-1]
-			non_inclusive_tax_amount = sum([flt(d.tax_amount_after_discount_amount)
-				for d in self.doc.get("taxes") if not d.included_in_print_rate])
+			non_inclusive_tax_amount = sum(flt(d.tax_amount_after_discount_amount)
+				for d in self.doc.get("taxes") if not d.included_in_print_rate)
 
 			diff = self.doc.total + non_inclusive_tax_amount \
 				- flt(last_tax.total, last_tax.precision("total"))
@@ -521,8 +521,8 @@
 
 	def calculate_total_advance(self):
 		if self.doc.docstatus < 2:
-			total_allocated_amount = sum([flt(adv.allocated_amount, adv.precision("allocated_amount"))
-				for adv in self.doc.get("advances")])
+			total_allocated_amount = sum(flt(adv.allocated_amount, adv.precision("allocated_amount"))
+				for adv in self.doc.get("advances"))
 
 			self.doc.total_advance = flt(total_allocated_amount, self.doc.precision("total_advance"))
 
@@ -622,7 +622,7 @@
 
 		if self.doc.doctype == "Sales Invoice" \
 			and self.doc.paid_amount > self.doc.grand_total and not self.doc.is_return \
-			and any([d.type == "Cash" for d in self.doc.payments]):
+			and any(d.type == "Cash" for d in self.doc.payments):
 			grand_total = self.doc.rounded_total or self.doc.grand_total
 			base_grand_total = self.doc.base_rounded_total or self.doc.base_grand_total
 
diff --git a/erpnext/controllers/tests/test_mapper.py b/erpnext/controllers/tests/test_mapper.py
index 66459fd..7a4b2d3 100644
--- a/erpnext/controllers/tests/test_mapper.py
+++ b/erpnext/controllers/tests/test_mapper.py
@@ -26,8 +26,8 @@
 
 		# Assert that all inserted items are present in updated sales order
 		src_items = item_list_1 + item_list_2 + item_list_3
-		self.assertEqual(set([d for d in src_items]),
-			set([d.item_code for d in updated_so.items]))
+		self.assertEqual(set(d for d in src_items),
+			set(d.item_code for d in updated_so.items))
 
 
 	def make_quotation(self, item_list, customer):
diff --git a/erpnext/controllers/website_list_for_contact.py b/erpnext/controllers/website_list_for_contact.py
index ecf041e..7c072e4 100644
--- a/erpnext/controllers/website_list_for_contact.py
+++ b/erpnext/controllers/website_list_for_contact.py
@@ -113,7 +113,7 @@
 			doc.set_indicator()
 
 		doc.status_display = ", ".join(doc.status_display)
-		doc.items_preview = ", ".join([d.item_name for d in doc.items if d.item_name])
+		doc.items_preview = ", ".join(d.item_name for d in doc.items if d.item_name)
 		result.append(doc)
 
 	return result
diff --git a/erpnext/manufacturing/doctype/job_card/job_card.py b/erpnext/manufacturing/doctype/job_card/job_card.py
index d764db3..cdc4518 100644
--- a/erpnext/manufacturing/doctype/job_card/job_card.py
+++ b/erpnext/manufacturing/doctype/job_card/job_card.py
@@ -317,7 +317,7 @@
 						'docstatus': ('!=', 2)}, fields = 'sum(transferred_qty) as qty', group_by='operation_id')
 
 					if job_cards:
-						qty = min([d.qty for d in job_cards])
+						qty = min(d.qty for d in job_cards)
 
 			doc.db_set('material_transferred_for_manufacturing', qty)
 
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index d1583f1..39a6024 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -232,7 +232,7 @@
 	meta = frappe.get_meta(doctype)
 	searchfields = meta.get_search_fields()
 	search_columns = ", " + ", ".join(searchfields) if searchfields else ''
-	search_cond = " or " + " or ".join([field + " like %(txt)s" for field in searchfields])
+	search_cond = " or " + " or ".join(field + " like %(txt)s" for field in searchfields)
 
 	return frappe.db.sql(""" select name {search_columns} from `tabProject`
 		where %(key)s like %(txt)s
diff --git a/erpnext/projects/doctype/timesheet/timesheet.py b/erpnext/projects/doctype/timesheet/timesheet.py
index a3e4577..c8bd80f 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.py
+++ b/erpnext/projects/doctype/timesheet/timesheet.py
@@ -87,8 +87,8 @@
 
 	def set_dates(self):
 		if self.docstatus < 2 and self.time_logs:
-			start_date = min([getdate(d.from_time) for d in self.time_logs])
-			end_date = max([getdate(d.to_time) for d in self.time_logs])
+			start_date = min(getdate(d.from_time) for d in self.time_logs)
+			end_date = max(getdate(d.to_time) for d in self.time_logs)
 
 			if start_date and end_date:
 				self.start_date = getdate(start_date)
diff --git a/erpnext/projects/report/project_summary/project_summary.py b/erpnext/projects/report/project_summary/project_summary.py
index 2c7bb49..98dd617 100644
--- a/erpnext/projects/report/project_summary/project_summary.py
+++ b/erpnext/projects/report/project_summary/project_summary.py
@@ -122,7 +122,7 @@
 	if not data:
 		return None
 
-	avg_completion = sum([project.percent_complete for project in data]) / len(data)
+	avg_completion = sum(project.percent_complete for project in data) / len(data)
 	total = sum([project.total_tasks for project in data])
 	total_overdue = sum([project.overdue_tasks for project in data])
 	completed = sum([project.completed_tasks for project in data])
diff --git a/erpnext/selling/doctype/customer/customer.py b/erpnext/selling/doctype/customer/customer.py
index 51d86ff..818888c 100644
--- a/erpnext/selling/doctype/customer/customer.py
+++ b/erpnext/selling/doctype/customer/customer.py
@@ -75,7 +75,7 @@
 				self.loyalty_program_tier = customer.loyalty_program_tier
 
 		if self.sales_team:
-			if sum([member.allocated_percentage or 0 for member in self.sales_team]) != 100:
+			if sum(member.allocated_percentage or 0 for member in self.sales_team) != 100:
 				frappe.throw(_("Total contribution percentage should be equal to 100"))
 
 	def check_customer_group_change(self):
diff --git a/erpnext/selling/doctype/quotation/quotation.py b/erpnext/selling/doctype/quotation/quotation.py
index 246f923..e4f8a47 100644
--- a/erpnext/selling/doctype/quotation/quotation.py
+++ b/erpnext/selling/doctype/quotation/quotation.py
@@ -50,7 +50,7 @@
 			self.customer_name = company_name or lead_name
 
 	def update_opportunity(self, status):
-		for opportunity in list(set([d.prevdoc_docname for d in self.get("items")])):
+		for opportunity in set(d.prevdoc_docname for d in self.get("items")):
 			if opportunity:
 				self.update_opportunity_status(status, opportunity)
 
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index d9e52e1..551f715 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -151,7 +151,7 @@
 			frappe.db.sql("update `tabOpportunity` set status = %s where name=%s",(flag,enq[0][0]))
 
 	def update_prevdoc_status(self, flag=None):
-		for quotation in list(set([d.prevdoc_docname for d in self.get("items")])):
+		for quotation in set(d.prevdoc_docname for d in self.get("items")):
 			if quotation:
 				doc = frappe.get_doc("Quotation", quotation)
 				if doc.docstatus==2:
diff --git a/erpnext/setup/doctype/company/company.py b/erpnext/setup/doctype/company/company.py
index 077538d..27e023c 100644
--- a/erpnext/setup/doctype/company/company.py
+++ b/erpnext/setup/doctype/company/company.py
@@ -54,7 +54,7 @@
 
 	def validate_abbr(self):
 		if not self.abbr:
-			self.abbr = ''.join([c[0] for c in self.company_name.split()]).upper()
+			self.abbr = ''.join(c[0] for c in self.company_name.split()).upper()
 
 		self.abbr = self.abbr.strip()
 
@@ -335,7 +335,7 @@
 		clear_defaults_cache()
 
 	def abbreviate(self):
-		self.abbr = ''.join([c[0].upper() for c in self.company_name.split()])
+		self.abbr = ''.join(c[0].upper() for c in self.company_name.split())
 
 	def on_trash(self):
 		"""
diff --git a/erpnext/setup/doctype/item_group/item_group.py b/erpnext/setup/doctype/item_group/item_group.py
index bff806d..db31d6d 100644
--- a/erpnext/setup/doctype/item_group/item_group.py
+++ b/erpnext/setup/doctype/item_group/item_group.py
@@ -139,7 +139,7 @@
 			# return child item groups if the type is of "Is Group"
 			return get_child_groups_for_list_in_html(item_group, start, limit, search)
 
-	child_groups = ", ".join([frappe.db.escape(i[0]) for i in get_child_groups(product_group)])
+	child_groups = ", ".join(frappe.db.escape(i[0]) for i in get_child_groups(product_group))
 
 	# base query
 	query = """select I.name, I.item_name, I.item_code, I.route, I.image, I.website_image, I.thumbnail, I.item_group,
@@ -239,7 +239,7 @@
 	return frappe.get_template(products_template).render(context)
 
 def get_group_item_count(item_group):
-	child_groups = ", ".join(['"' + i[0] + '"' for i in get_child_groups(item_group)])
+	child_groups = ", ".join('"' + i[0] + '"' for i in get_child_groups(item_group))
 	return frappe.db.sql("""select count(*) from `tabItem`
 		where docstatus = 0 and show_in_website = 1
 		and (item_group in (%s)
diff --git a/erpnext/stock/doctype/batch/batch.py b/erpnext/stock/doctype/batch/batch.py
index 8fdda56..508e17c 100644
--- a/erpnext/stock/doctype/batch/batch.py
+++ b/erpnext/stock/doctype/batch/batch.py
@@ -304,7 +304,7 @@
 		frappe.throw(_("The serial no {0} does not belong to item {1}")
 			.format(get_link_to_form("Serial No", serial_nos[0]), get_link_to_form("Item", item_code)))
 
-	serial_no_link = ','.join([get_link_to_form("Serial No", sn) for sn in serial_nos])
+	serial_no_link = ','.join(get_link_to_form("Serial No", sn) for sn in serial_nos)
 
 	message = "Serial Nos" if len(serial_nos) > 1 else "Serial No"
 	frappe.throw(_("There is no batch found against the {0}: {1}")
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index cce51cb..dd31965 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -264,7 +264,7 @@
 		"""
 			Validate that if packed qty exists, it should be equal to qty
 		"""
-		if not any([flt(d.get('packed_qty')) for d in self.get("items")]):
+		if not any(flt(d.get('packed_qty')) for d in self.get("items")):
 			return
 		has_error = False
 		for d in self.get("items"):
diff --git a/erpnext/stock/doctype/delivery_trip/delivery_trip.py b/erpnext/stock/doctype/delivery_trip/delivery_trip.py
index 81e7301..9ec28d8 100644
--- a/erpnext/stock/doctype/delivery_trip/delivery_trip.py
+++ b/erpnext/stock/doctype/delivery_trip/delivery_trip.py
@@ -68,7 +68,7 @@
 			delete (bool, optional): Defaults to `False`. `True` if driver details need to be emptied, else `False`.
 		"""
 
-		delivery_notes = list(set([stop.delivery_note for stop in self.delivery_stops if stop.delivery_note]))
+		delivery_notes = list(set(stop.delivery_note for stop in self.delivery_stops if stop.delivery_note))
 
 		update_fields = {
 			"driver": self.driver,
@@ -136,8 +136,8 @@
 
 				# Include last leg in the final distance calculation
 				self.uom = self.default_distance_uom
-				total_distance = sum([leg.get("distance", {}).get("value", 0.0)
-					for leg in directions.get("legs")])  # in meters
+				total_distance = sum(leg.get("distance", {}).get("value", 0.0)
+					for leg in directions.get("legs"))  # in meters
 				self.total_distance = total_distance * self.uom_conversion_factor
 			else:
 				idx += len(route) - 1
diff --git a/erpnext/stock/doctype/landed_cost_voucher/landed_cost_voucher.py b/erpnext/stock/doctype/landed_cost_voucher/landed_cost_voucher.py
index 8310946..5df4d87 100644
--- a/erpnext/stock/doctype/landed_cost_voucher/landed_cost_voucher.py
+++ b/erpnext/stock/doctype/landed_cost_voucher/landed_cost_voucher.py
@@ -78,7 +78,7 @@
 					.format(item.idx, item.item_code))
 
 	def set_total_taxes_and_charges(self):
-		self.total_taxes_and_charges = sum([flt(d.base_amount) for d in self.get("taxes")])
+		self.total_taxes_and_charges = sum(flt(d.base_amount) for d in self.get("taxes"))
 
 	def set_applicable_charges_on_item(self):
 		if self.get('taxes') and self.distribute_charges_based_on != 'Distribute Manually':
@@ -104,15 +104,15 @@
 		based_on = self.distribute_charges_based_on.lower()
 
 		if based_on != 'distribute manually':
-			total = sum([flt(d.get(based_on)) for d in self.get("items")])
+			total = sum(flt(d.get(based_on)) for d in self.get("items"))
 		else:
 			# consider for proportion while distributing manually
-			total = sum([flt(d.get('applicable_charges')) for d in self.get("items")])
+			total = sum(flt(d.get('applicable_charges')) for d in self.get("items"))
 
 		if not total:
 			frappe.throw(_("Total {0} for all items is zero, may be you should change 'Distribute Charges Based On'").format(based_on))
 
-		total_applicable_charges = sum([flt(d.applicable_charges) for d in self.get("items")])
+		total_applicable_charges = sum(flt(d.applicable_charges) for d in self.get("items"))
 
 		precision = get_field_precision(frappe.get_meta("Landed Cost Item").get_field("applicable_charges"),
 		currency=frappe.get_cached_value('Company',  self.company,  "default_currency"))
diff --git a/erpnext/stock/doctype/landed_cost_voucher/test_landed_cost_voucher.py b/erpnext/stock/doctype/landed_cost_voucher/test_landed_cost_voucher.py
index 984ae46..32b08f6 100644
--- a/erpnext/stock/doctype/landed_cost_voucher/test_landed_cost_voucher.py
+++ b/erpnext/stock/doctype/landed_cost_voucher/test_landed_cost_voucher.py
@@ -311,7 +311,7 @@
 
 def distribute_landed_cost_on_items(lcv):
 	based_on = lcv.distribute_charges_based_on.lower()
-	total = sum([flt(d.get(based_on)) for d in lcv.get("items")])
+	total = sum(flt(d.get(based_on)) for d in lcv.get("items"))
 
 	for item in lcv.get("items"):
 		item.applicable_charges = flt(item.get(based_on)) * flt(lcv.total_taxes_and_charges) / flt(total)
diff --git a/erpnext/stock/doctype/packing_slip/packing_slip.py b/erpnext/stock/doctype/packing_slip/packing_slip.py
index 2008bff..4a843e0 100644
--- a/erpnext/stock/doctype/packing_slip/packing_slip.py
+++ b/erpnext/stock/doctype/packing_slip/packing_slip.py
@@ -88,9 +88,9 @@
 		rows = [d.item_code for d in self.get("items")]
 
 		# also pick custom fields from delivery note
-		custom_fields = ', '.join(['dni.`{0}`'.format(d.fieldname)
+		custom_fields = ', '.join('dni.`{0}`'.format(d.fieldname)
 			for d in frappe.get_meta("Delivery Note Item").get_custom_fields()
-			if d.fieldtype not in no_value_fields])
+			if d.fieldtype not in no_value_fields)
 
 		if custom_fields:
 			custom_fields = ', ' + custom_fields
diff --git a/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py b/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
index 5095a80..8d9b675 100644
--- a/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
+++ b/erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py
@@ -246,7 +246,7 @@
 		pr = make_purchase_receipt(item_code="_Test FG Item", qty=10, rate=500, is_subcontracted="Yes")
 		self.assertEqual(len(pr.get("supplied_items")), 2)
 
-		rm_supp_cost = sum([d.amount for d in pr.get("supplied_items")])
+		rm_supp_cost = sum(d.amount for d in pr.get("supplied_items"))
 		self.assertEqual(pr.get("items")[0].rm_supp_cost, flt(rm_supp_cost, 2))
 
 		pr.cancel()
diff --git a/erpnext/stock/doctype/serial_no/serial_no.py b/erpnext/stock/doctype/serial_no/serial_no.py
index 5ecc9f8..b236f6a 100644
--- a/erpnext/stock/doctype/serial_no/serial_no.py
+++ b/erpnext/stock/doctype/serial_no/serial_no.py
@@ -613,7 +613,7 @@
 	batch_nos = filters.get("batch_no")
 	expiry_date = filters.get("expiry_date")
 	if batch_nos:
-		batch_no_condition = """and sr.batch_no in ({}) """.format(', '.join(["'%s'" % d for d in batch_nos]))
+		batch_no_condition = """and sr.batch_no in ({}) """.format(', '.join("'%s'" % d for d in batch_nos))
 
 	if expiry_date:
 		batch_join_selection = "LEFT JOIN `tabBatch` batch on sr.batch_no = batch.name "
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index 2f76bc7..560ceaa 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -465,7 +465,7 @@
 		"""
 		# Set rate for outgoing items
 		outgoing_items_cost = self.set_rate_for_outgoing_items(reset_outgoing_rate, raise_error_if_no_rate)
-		finished_item_qty = sum([d.transfer_qty for d in self.items if d.is_finished_item])
+		finished_item_qty = sum(d.transfer_qty for d in self.items if d.is_finished_item)
 
 		# Set basic rate for incoming items
 		for d in self.get('items'):
diff --git a/erpnext/stock/report/item_price_stock/item_price_stock.py b/erpnext/stock/report/item_price_stock/item_price_stock.py
index 5296211..db7498b 100644
--- a/erpnext/stock/report/item_price_stock/item_price_stock.py
+++ b/erpnext/stock/report/item_price_stock/item_price_stock.py
@@ -89,7 +89,7 @@
 		{conditions}"""
 		.format(conditions=conditions), filters, as_dict=1)
 
-	price_list_names = list(set([item.price_list_name for item in item_results]))
+	price_list_names = list(set(item.price_list_name for item in item_results))
 
 	buying_price_map = get_price_map(price_list_names, buying=1)
 	selling_price_map = get_price_map(price_list_names, selling=1)
diff --git a/erpnext/stock/report/itemwise_recommended_reorder_level/itemwise_recommended_reorder_level.py b/erpnext/stock/report/itemwise_recommended_reorder_level/itemwise_recommended_reorder_level.py
index 2f70523..2e13aa0 100644
--- a/erpnext/stock/report/itemwise_recommended_reorder_level/itemwise_recommended_reorder_level.py
+++ b/erpnext/stock/report/itemwise_recommended_reorder_level/itemwise_recommended_reorder_level.py
@@ -66,7 +66,7 @@
 			purpose is NULL
 			or purpose not in ({})
 		)
-	""".format(', '.join([f"'{p}'" for p in purpose_to_exclude]))
+	""".format(', '.join(f"'{p}'" for p in purpose_to_exclude))
 	condition = condition.replace("posting_date", "sle.posting_date")
 
 	consumed_items = frappe.db.sql("""
diff --git a/erpnext/stock/report/product_bundle_balance/product_bundle_balance.py b/erpnext/stock/report/product_bundle_balance/product_bundle_balance.py
index 276e42e..8fffbcc 100644
--- a/erpnext/stock/report/product_bundle_balance/product_bundle_balance.py
+++ b/erpnext/stock/report/product_bundle_balance/product_bundle_balance.py
@@ -141,7 +141,7 @@
 		return []
 
 	item_conditions_sql = ' and sle.item_code in ({})' \
-		.format(', '.join([frappe.db.escape(i) for i in items]))
+		.format(', '.join(frappe.db.escape(i) for i in items))
 
 	conditions = get_sle_conditions(filters)
 
diff --git a/erpnext/stock/report/stock_balance/stock_balance.py b/erpnext/stock/report/stock_balance/stock_balance.py
index bbd73e9..b6a8063 100644
--- a/erpnext/stock/report/stock_balance/stock_balance.py
+++ b/erpnext/stock/report/stock_balance/stock_balance.py
@@ -157,7 +157,7 @@
 	item_conditions_sql = ''
 	if items:
 		item_conditions_sql = ' and sle.item_code in ({})'\
-			.format(', '.join([frappe.db.escape(i, percent=False) for i in items]))
+			.format(', '.join(frappe.db.escape(i, percent=False) for i in items))
 
 	conditions = get_conditions(filters)
 
@@ -253,7 +253,7 @@
 def get_item_details(items, sle, filters):
 	item_details = {}
 	if not items:
-		items = list(set([d.item_code for d in sle]))
+		items = list(set(d.item_code for d in sle))
 
 	if not items:
 		return item_details
@@ -291,7 +291,7 @@
 			select parent, warehouse, warehouse_reorder_qty, warehouse_reorder_level
 			from `tabItem Reorder`
 			where parent in ({0})
-		""".format(', '.join([frappe.db.escape(i, percent=False) for i in items])), as_dict=1)
+		""".format(', '.join(frappe.db.escape(i, percent=False) for i in items)), as_dict=1)
 
 	return dict((d.parent + d.warehouse, d) for d in item_reorder_details)
 
diff --git a/erpnext/stock/report/stock_ledger/stock_ledger.py b/erpnext/stock/report/stock_ledger/stock_ledger.py
index 36996e9..8909f21 100644
--- a/erpnext/stock/report/stock_ledger/stock_ledger.py
+++ b/erpnext/stock/report/stock_ledger/stock_ledger.py
@@ -115,7 +115,7 @@
 	item_conditions_sql = ''
 	if items:
 		item_conditions_sql = 'and sle.item_code in ({})'\
-			.format(', '.join([frappe.db.escape(i) for i in items]))
+			.format(', '.join(frappe.db.escape(i) for i in items))
 
 	sl_entries = frappe.db.sql("""
 		SELECT
@@ -169,7 +169,7 @@
 def get_item_details(items, sl_entries, include_uom):
 	item_details = {}
 	if not items:
-		items = list(set([d.item_code for d in sl_entries]))
+		items = list(set(d.item_code for d in sl_entries))
 
 	if not items:
 		return item_details
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index b2825fc..fc82c78 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -521,7 +521,7 @@
 			fields=["purchase_rate", "name", "company"],
 			filters = {'name': ('in', serial_nos)})
 
-		incoming_values = sum([flt(d.purchase_rate) for d in all_serial_nos if d.company==sle.company])
+		incoming_values = sum(flt(d.purchase_rate) for d in all_serial_nos if d.company==sle.company)
 
 		# Get rate for serial nos which has been transferred to other company
 		invalid_serial_nos = [d.name for d in all_serial_nos if d.company!=sle.company]
diff --git a/erpnext/support/doctype/warranty_claim/warranty_claim.py b/erpnext/support/doctype/warranty_claim/warranty_claim.py
index a3428a2..a20e7a8 100644
--- a/erpnext/support/doctype/warranty_claim/warranty_claim.py
+++ b/erpnext/support/doctype/warranty_claim/warranty_claim.py
@@ -29,7 +29,7 @@
 			where t2.parent = t1.name and t2.prevdoc_docname = %s and	t1.docstatus!=2""",
 			(self.name))
 		if lst:
-			lst1 = ','.join([x[0] for x in lst])
+			lst1 = ','.join(x[0] for x in lst)
 			frappe.throw(_("Cancel Material Visit {0} before cancelling this Warranty Claim").format(lst1))
 		else:
 			frappe.db.set(self, 'status', 'Cancelled')
diff --git a/erpnext/utilities/product.py b/erpnext/utilities/product.py
index 66d6cd3..70b4176 100644
--- a/erpnext/utilities/product.py
+++ b/erpnext/utilities/product.py
@@ -131,6 +131,6 @@
 	if frappe.db.exists("Product Bundle", item_code):
 		items = frappe.get_doc("Product Bundle", item_code).get_all_children()
 		bundle_warehouse = frappe.db.get_value('Item', item_code, item_warehouse_field)
-		return all([ get_qty_in_stock(d.item_code, item_warehouse_field, bundle_warehouse).in_stock for d in items ])
+		return all(get_qty_in_stock(d.item_code, item_warehouse_field, bundle_warehouse).in_stock for d in items)
 	else:
 		return 1
diff --git a/erpnext/utilities/transaction_base.py b/erpnext/utilities/transaction_base.py
index f99da58..db99726 100644
--- a/erpnext/utilities/transaction_base.py
+++ b/erpnext/utilities/transaction_base.py
@@ -147,7 +147,7 @@
 		if hasattr(self, "prev_link_mapper") and self.prev_link_mapper.get(for_doctype):
 			fieldname = self.prev_link_mapper[for_doctype]["fieldname"]
 
-			values = filter(None, tuple([item.as_dict()[fieldname] for item in self.items]))
+			values = filter(None, tuple(item.as_dict()[fieldname] for item in self.items))
 
 			if values:
 				ret = {
@@ -180,7 +180,7 @@
 	if isinstance(qty_fields, string_types):
 		qty_fields = [qty_fields]
 
-	distinct_uoms = list(set([d.get(uom_field) for d in doc.get_all_children()]))
+	distinct_uoms = list(set(d.get(uom_field) for d in doc.get_all_children()))
 	integer_uoms = list(filter(lambda uom: frappe.db.get_value("UOM", uom,
 		"must_be_whole_number", cache=True) or None, distinct_uoms))