diff --git a/erpnext/accounts/doctype/tax_rule/tax_rule.py b/erpnext/accounts/doctype/tax_rule/tax_rule.py
index 2e92e05..028fa72 100644
--- a/erpnext/accounts/doctype/tax_rule/tax_rule.py
+++ b/erpnext/accounts/doctype/tax_rule/tax_rule.py
@@ -11,6 +11,8 @@
 from frappe.utils.nestedset import get_root_of
 from erpnext.setup.doctype.customer_group.customer_group import get_parent_customer_groups
 
+from six import iteritems
+
 class IncorrectCustomerGroup(frappe.ValidationError): pass
 class IncorrectSupplierType(frappe.ValidationError): pass
 class ConflictingTaxRule(frappe.ValidationError): pass
@@ -133,7 +135,7 @@
 	conditions = ["""(from_date is null or from_date <= '{0}')
 		and (to_date is null or to_date >= '{0}')""".format(posting_date)]
 
-	for key, value in args.iteritems():
+	for key, value in iteritems(args):
 		if key=="use_for_shopping_cart":
 			conditions.append("use_for_shopping_cart = {0}".format(1 if value else 0))
 		if key == 'customer_group':
diff --git a/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py b/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
index 21b0d58..52735ef 100644
--- a/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
+++ b/erpnext/hr/doctype/payroll_entry/test_payroll_entry.py
@@ -167,9 +167,9 @@
 		current_fiscal_year = get_fiscal_year(nowdate(), as_dict=True)
 		dt = getdate(nowdate())
 
-		new_year = dt + relativedelta(month=01, day=01, year=dt.year)
-		republic_day = dt + relativedelta(month=01, day=26, year=dt.year)
-		test_holiday = dt + relativedelta(month=02, day=02, year=dt.year)
+		new_year = dt + relativedelta(month=1, day=1, year=dt.year)
+		republic_day = dt + relativedelta(month=1, day=26, year=dt.year)
+		test_holiday = dt + relativedelta(month=2, day=2, year=dt.year)
 
 		frappe.get_doc({
 			'doctype': 'Holiday List',
diff --git a/erpnext/patches/v4_0/validate_v3_patch.py b/erpnext/patches/v4_0/validate_v3_patch.py
index 5f72847..3df39ed 100644
--- a/erpnext/patches/v4_0/validate_v3_patch.py
+++ b/erpnext/patches/v4_0/validate_v3_patch.py
@@ -8,4 +8,4 @@
 	from frappe.modules.patch_handler import executed
 	last_v3_patch = 'patches.1401.fix_pos_outstanding'
 	if not executed(last_v3_patch):
-		raise Exception, "site not ready to migrate to version 4"
+		raise Exception("site not ready to migrate to version 4")
diff --git a/erpnext/stock/doctype/stock_entry/test_stock_entry.py b/erpnext/stock/doctype/stock_entry/test_stock_entry.py
index b2f85d0..be92ce1 100644
--- a/erpnext/stock/doctype/stock_entry/test_stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/test_stock_entry.py
@@ -17,9 +17,11 @@
 from erpnext.accounts.doctype.account.test_account import get_inventory_account
 from erpnext.stock.doctype.stock_entry.stock_entry import move_sample_to_retention_warehouse
 
+from six import iteritems
+
 def get_sle(**args):
 	condition, values = "", []
-	for key, value in args.iteritems():
+	for key, value in iteritems(args.iteritems):
 		condition += " and " if condition else " where "
 		condition += "`{0}`=%s".format(key)
 		values.append(value)
diff --git a/erpnext/stock/stock_ledger.py b/erpnext/stock/stock_ledger.py
index 956f976..4d4435e 100644
--- a/erpnext/stock/stock_ledger.py
+++ b/erpnext/stock/stock_ledger.py
@@ -8,6 +8,8 @@
 from erpnext.stock.utils import get_valuation_method
 import json
 
+from six import iteritems
+
 # future reposting
 class NegativeStockError(frappe.ValidationError): pass
 
@@ -87,7 +89,7 @@
 				"allow_negative_stock"))
 
 		self.args = args
-		for key, value in args.iteritems():
+		for key, value in iteritems(args):
 			setattr(self, key, value)
 
 		self.previous_sle = self.get_sle_before_datetime()