style: format code with black
diff --git a/erpnext/controllers/subcontracting.py b/erpnext/controllers/subcontracting.py
index c52c688..7083088 100644
--- a/erpnext/controllers/subcontracting.py
+++ b/erpnext/controllers/subcontracting.py
@@ -8,9 +8,9 @@
 from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos
 
 
-class Subcontracting():
+class Subcontracting:
 	def set_materials_for_subcontracted_items(self, raw_material_table):
-		if self.doctype == 'Purchase Invoice' and not self.update_stock:
+		if self.doctype == "Purchase Invoice" and not self.update_stock:
 			return
 
 		self.raw_material_table = raw_material_table
@@ -33,13 +33,14 @@
 		self.__get_backflush_based_on()
 
 	def __get_backflush_based_on(self):
-		self.backflush_based_on = frappe.db.get_single_value("Buying Settings",
-			"backflush_raw_materials_of_subcontract_based_on")
+		self.backflush_based_on = frappe.db.get_single_value(
+			"Buying Settings", "backflush_raw_materials_of_subcontract_based_on"
+		)
 
 	def __get_purchase_orders(self):
 		self.purchase_orders = []
 
-		if self.doctype == 'Purchase Order':
+		if self.doctype == "Purchase Order":
 			return
 
 		self.purchase_orders = [d.purchase_order for d in self.items if d.purchase_order]
@@ -48,7 +49,7 @@
 		self.__changed_name = []
 		self.__reference_name = []
 
-		if self.doctype == 'Purchase Order' or self.is_new():
+		if self.doctype == "Purchase Order" or self.is_new():
 			self.set(self.raw_material_table, [])
 			return
 
@@ -68,20 +69,20 @@
 
 	def __get_data_before_save(self):
 		item_dict = {}
-		if self.doctype in ['Purchase Receipt', 'Purchase Invoice'] and self._doc_before_save:
-			for row in self._doc_before_save.get('items'):
+		if self.doctype in ["Purchase Receipt", "Purchase Invoice"] and self._doc_before_save:
+			for row in self._doc_before_save.get("items"):
 				item_dict[row.name] = (row.item_code, row.qty)
 
 		return item_dict
 
 	def get_available_materials(self):
-		''' Get the available raw materials which has been transferred to the supplier.
-			available_materials = {
-				(item_code, subcontracted_item, purchase_order): {
-					'qty': 1, 'serial_no': [ABC], 'batch_no': {'batch1': 1}, 'data': item_details
-				}
-			}
-		'''
+		"""Get the available raw materials which has been transferred to the supplier.
+		available_materials = {
+		        (item_code, subcontracted_item, purchase_order): {
+		                'qty': 1, 'serial_no': [ABC], 'batch_no': {'batch1': 1}, 'data': item_details
+		        }
+		}
+		"""
 		if not self.purchase_orders:
 			return
 
@@ -89,8 +90,17 @@
 			key = (row.rm_item_code, row.main_item_code, row.purchase_order)
 
 			if key not in self.available_materials:
-				self.available_materials.setdefault(key, frappe._dict({'qty': 0, 'serial_no': [],
-					'batch_no': defaultdict(float), 'item_details': row, 'po_details': []})
+				self.available_materials.setdefault(
+					key,
+					frappe._dict(
+						{
+							"qty": 0,
+							"serial_no": [],
+							"batch_no": defaultdict(float),
+							"item_details": row,
+							"po_details": [],
+						}
+					),
 				)
 
 			details = self.available_materials[key]
@@ -106,17 +116,17 @@
 			self.__set_alternative_item_details(row)
 
 		self.__transferred_items = copy.deepcopy(self.available_materials)
-		for doctype in ['Purchase Receipt', 'Purchase Invoice']:
+		for doctype in ["Purchase Receipt", "Purchase Invoice"]:
 			self.__update_consumed_materials(doctype)
 
 	def __update_consumed_materials(self, doctype, return_consumed_items=False):
-		'''Deduct the consumed materials from the available materials.'''
+		"""Deduct the consumed materials from the available materials."""
 
 		pr_items = self.__get_received_items(doctype)
 		if not pr_items:
 			return ([], {}) if return_consumed_items else None
 
-		pr_items = {d.name: d.get(self.get('po_field') or 'purchase_order') for d in pr_items}
+		pr_items = {d.name: d.get(self.get("po_field") or "purchase_order") for d in pr_items}
 		consumed_materials = self.__get_consumed_items(doctype, pr_items.keys())
 
 		if return_consumed_items:
@@ -127,97 +137,153 @@
 			if not self.available_materials.get(key):
 				continue
 
-			self.available_materials[key]['qty'] -= row.consumed_qty
+			self.available_materials[key]["qty"] -= row.consumed_qty
 			if row.serial_no:
-				self.available_materials[key]['serial_no'] = list(
-					set(self.available_materials[key]['serial_no']) - set(get_serial_nos(row.serial_no))
+				self.available_materials[key]["serial_no"] = list(
+					set(self.available_materials[key]["serial_no"]) - set(get_serial_nos(row.serial_no))
 				)
 
 			if row.batch_no:
-				self.available_materials[key]['batch_no'][row.batch_no] -= row.consumed_qty
+				self.available_materials[key]["batch_no"][row.batch_no] -= row.consumed_qty
 
 	def __get_transferred_items(self):
-		fields = ['`tabStock Entry`.`purchase_order`']
-		alias_dict = {'item_code': 'rm_item_code', 'subcontracted_item': 'main_item_code', 'basic_rate': 'rate'}
+		fields = ["`tabStock Entry`.`purchase_order`"]
+		alias_dict = {
+			"item_code": "rm_item_code",
+			"subcontracted_item": "main_item_code",
+			"basic_rate": "rate",
+		}
 
-		child_table_fields = ['item_code', 'item_name', 'description', 'qty', 'basic_rate', 'amount',
-			'serial_no', 'uom', 'subcontracted_item', 'stock_uom', 'batch_no', 'conversion_factor',
-			's_warehouse', 't_warehouse', 'item_group', 'po_detail']
+		child_table_fields = [
+			"item_code",
+			"item_name",
+			"description",
+			"qty",
+			"basic_rate",
+			"amount",
+			"serial_no",
+			"uom",
+			"subcontracted_item",
+			"stock_uom",
+			"batch_no",
+			"conversion_factor",
+			"s_warehouse",
+			"t_warehouse",
+			"item_group",
+			"po_detail",
+		]
 
-		if self.backflush_based_on == 'BOM':
-			child_table_fields.append('original_item')
+		if self.backflush_based_on == "BOM":
+			child_table_fields.append("original_item")
 
 		for field in child_table_fields:
-			fields.append(f'`tabStock Entry Detail`.`{field}` As {alias_dict.get(field, field)}')
+			fields.append(f"`tabStock Entry Detail`.`{field}` As {alias_dict.get(field, field)}")
 
-		filters = [['Stock Entry', 'docstatus', '=', 1], ['Stock Entry', 'purpose', '=', 'Send to Subcontractor'],
-			['Stock Entry', 'purchase_order', 'in', self.purchase_orders]]
+		filters = [
+			["Stock Entry", "docstatus", "=", 1],
+			["Stock Entry", "purpose", "=", "Send to Subcontractor"],
+			["Stock Entry", "purchase_order", "in", self.purchase_orders],
+		]
 
-		return frappe.get_all('Stock Entry', fields = fields, filters=filters)
+		return frappe.get_all("Stock Entry", fields=fields, filters=filters)
 
 	def __get_received_items(self, doctype):
 		fields = []
-		self.po_field = 'purchase_order'
+		self.po_field = "purchase_order"
 
-		for field in ['name', self.po_field, 'parent']:
-			fields.append(f'`tab{doctype} Item`.`{field}`')
+		for field in ["name", self.po_field, "parent"]:
+			fields.append(f"`tab{doctype} Item`.`{field}`")
 
-		filters = [[doctype, 'docstatus', '=', 1], [f'{doctype} Item', self.po_field, 'in', self.purchase_orders]]
-		if doctype == 'Purchase Invoice':
-			filters.append(['Purchase Invoice', 'update_stock', "=", 1])
+		filters = [
+			[doctype, "docstatus", "=", 1],
+			[f"{doctype} Item", self.po_field, "in", self.purchase_orders],
+		]
+		if doctype == "Purchase Invoice":
+			filters.append(["Purchase Invoice", "update_stock", "=", 1])
 
-		return frappe.get_all(f'{doctype}', fields = fields, filters = filters)
+		return frappe.get_all(f"{doctype}", fields=fields, filters=filters)
 
 	def __get_consumed_items(self, doctype, pr_items):
-		return frappe.get_all('Purchase Receipt Item Supplied',
-			fields = ['serial_no', 'rm_item_code', 'reference_name', 'batch_no', 'consumed_qty', 'main_item_code'],
-			filters = {'docstatus': 1, 'reference_name': ('in', list(pr_items)), 'parenttype': doctype})
+		return frappe.get_all(
+			"Purchase Receipt Item Supplied",
+			fields=[
+				"serial_no",
+				"rm_item_code",
+				"reference_name",
+				"batch_no",
+				"consumed_qty",
+				"main_item_code",
+			],
+			filters={"docstatus": 1, "reference_name": ("in", list(pr_items)), "parenttype": doctype},
+		)
 
 	def __set_alternative_item_details(self, row):
-		if row.get('original_item'):
-			self.alternative_item_details[row.get('original_item')] = row
+		if row.get("original_item"):
+			self.alternative_item_details[row.get("original_item")] = row
 
 	def __get_pending_qty_to_receive(self):
-		'''Get qty to be received against the purchase order.'''
+		"""Get qty to be received against the purchase order."""
 
 		self.qty_to_be_received = defaultdict(float)
 
-		if self.doctype != 'Purchase Order' and self.backflush_based_on != 'BOM' and self.purchase_orders:
-			for row in frappe.get_all('Purchase Order Item',
-				fields = ['item_code', '(qty - received_qty) as qty', 'parent', 'name'],
-				filters = {'docstatus': 1, 'parent': ('in', self.purchase_orders)}):
+		if (
+			self.doctype != "Purchase Order" and self.backflush_based_on != "BOM" and self.purchase_orders
+		):
+			for row in frappe.get_all(
+				"Purchase Order Item",
+				fields=["item_code", "(qty - received_qty) as qty", "parent", "name"],
+				filters={"docstatus": 1, "parent": ("in", self.purchase_orders)},
+			):
 
 				self.qty_to_be_received[(row.item_code, row.parent)] += row.qty
 
 	def __get_materials_from_bom(self, item_code, bom_no, exploded_item=0):
-		doctype = 'BOM Item' if not exploded_item else 'BOM Explosion Item'
-		fields = [f'`tab{doctype}`.`stock_qty` / `tabBOM`.`quantity` as qty_consumed_per_unit']
+		doctype = "BOM Item" if not exploded_item else "BOM Explosion Item"
+		fields = [f"`tab{doctype}`.`stock_qty` / `tabBOM`.`quantity` as qty_consumed_per_unit"]
 
-		alias_dict = {'item_code': 'rm_item_code', 'name': 'bom_detail_no', 'source_warehouse': 'reserve_warehouse'}
-		for field in ['item_code', 'name', 'rate', 'stock_uom',
-			'source_warehouse', 'description', 'item_name', 'stock_uom']:
-			fields.append(f'`tab{doctype}`.`{field}` As {alias_dict.get(field, field)}')
+		alias_dict = {
+			"item_code": "rm_item_code",
+			"name": "bom_detail_no",
+			"source_warehouse": "reserve_warehouse",
+		}
+		for field in [
+			"item_code",
+			"name",
+			"rate",
+			"stock_uom",
+			"source_warehouse",
+			"description",
+			"item_name",
+			"stock_uom",
+		]:
+			fields.append(f"`tab{doctype}`.`{field}` As {alias_dict.get(field, field)}")
 
-		filters = [[doctype, 'parent', '=', bom_no], [doctype, 'docstatus', '=', 1],
-			['BOM', 'item', '=', item_code], [doctype, 'sourced_by_supplier', '=', 0]]
+		filters = [
+			[doctype, "parent", "=", bom_no],
+			[doctype, "docstatus", "=", 1],
+			["BOM", "item", "=", item_code],
+			[doctype, "sourced_by_supplier", "=", 0],
+		]
 
-		return frappe.get_all('BOM', fields = fields, filters=filters, order_by = f'`tab{doctype}`.`idx`') or []
+		return (
+			frappe.get_all("BOM", fields=fields, filters=filters, order_by=f"`tab{doctype}`.`idx`") or []
+		)
 
 	def __remove_changed_rows(self):
 		if not self.__changed_name:
 			return
 
-		i=1
+		i = 1
 		self.set(self.raw_material_table, [])
 		for d in self._doc_before_save.supplied_items:
 			if d.reference_name in self.__changed_name:
 				continue
 
-			if (d.reference_name not in self.__reference_name):
+			if d.reference_name not in self.__reference_name:
 				continue
 
 			d.idx = i
-			self.append('supplied_items', d)
+			self.append("supplied_items", d)
 
 			i += 1
 
@@ -226,31 +292,35 @@
 
 		has_supplied_items = True if self.get(self.raw_material_table) else False
 		for row in self.items:
-			if (self.doctype != 'Purchase Order' and ((self.__changed_name and row.name not in self.__changed_name)
-				or (has_supplied_items and not self.__changed_name))):
+			if self.doctype != "Purchase Order" and (
+				(self.__changed_name and row.name not in self.__changed_name)
+				or (has_supplied_items and not self.__changed_name)
+			):
 				continue
 
-			if self.doctype == 'Purchase Order' or self.backflush_based_on == 'BOM':
-				for bom_item in self.__get_materials_from_bom(row.item_code, row.bom, row.get('include_exploded_items')):
-					qty = (flt(bom_item.qty_consumed_per_unit) * flt(row.qty) * row.conversion_factor)
+			if self.doctype == "Purchase Order" or self.backflush_based_on == "BOM":
+				for bom_item in self.__get_materials_from_bom(
+					row.item_code, row.bom, row.get("include_exploded_items")
+				):
+					qty = flt(bom_item.qty_consumed_per_unit) * flt(row.qty) * row.conversion_factor
 					bom_item.main_item_code = row.item_code
 					self.__update_reserve_warehouse(bom_item, row)
 					self.__set_alternative_item(bom_item)
 					self.__add_supplied_item(row, bom_item, qty)
 
-			elif self.backflush_based_on != 'BOM':
+			elif self.backflush_based_on != "BOM":
 				for key, transfer_item in self.available_materials.items():
 					if (key[1], key[2]) == (row.item_code, row.purchase_order) and transfer_item.qty > 0:
 						qty = self.__get_qty_based_on_material_transfer(row, transfer_item) or 0
 						transfer_item.qty -= qty
-						self.__add_supplied_item(row, transfer_item.get('item_details'), qty)
+						self.__add_supplied_item(row, transfer_item.get("item_details"), qty)
 
 				if self.qty_to_be_received:
 					self.qty_to_be_received[(row.item_code, row.purchase_order)] -= row.qty
 
 	def __update_reserve_warehouse(self, row, item):
-		if self.doctype == 'Purchase Order':
-			row.reserve_warehouse = (self.set_reserve_warehouse or item.warehouse)
+		if self.doctype == "Purchase Order":
+			row.reserve_warehouse = self.set_reserve_warehouse or item.warehouse
 
 	def __get_qty_based_on_material_transfer(self, item_row, transfer_item):
 		key = (item_row.item_code, item_row.purchase_order)
@@ -262,8 +332,9 @@
 			qty = (flt(item_row.qty) * flt(transfer_item.qty)) / flt(self.qty_to_be_received.get(key, 0))
 			transfer_item.item_details.required_qty = transfer_item.qty
 
-			if (transfer_item.serial_no or frappe.get_cached_value('UOM',
-				transfer_item.item_details.stock_uom, 'must_be_whole_number')):
+			if transfer_item.serial_no or frappe.get_cached_value(
+				"UOM", transfer_item.item_details.stock_uom, "must_be_whole_number"
+			):
 				return frappe.utils.ceil(qty)
 
 			return qty
@@ -277,7 +348,7 @@
 		rm_obj = self.append(self.raw_material_table, bom_item)
 		rm_obj.reference_name = item_row.name
 
-		if self.doctype == 'Purchase Order':
+		if self.doctype == "Purchase Order":
 			rm_obj.required_qty = qty
 		else:
 			rm_obj.consumed_qty = 0
@@ -287,12 +358,12 @@
 	def __set_batch_nos(self, bom_item, item_row, rm_obj, qty):
 		key = (rm_obj.rm_item_code, item_row.item_code, item_row.purchase_order)
 
-		if (self.available_materials.get(key) and self.available_materials[key]['batch_no']):
+		if self.available_materials.get(key) and self.available_materials[key]["batch_no"]:
 			new_rm_obj = None
-			for batch_no, batch_qty in self.available_materials[key]['batch_no'].items():
+			for batch_no, batch_qty in self.available_materials[key]["batch_no"].items():
 				if batch_qty >= qty:
 					self.__set_batch_no_as_per_qty(item_row, rm_obj, batch_no, qty)
-					self.available_materials[key]['batch_no'][batch_no] -= qty
+					self.available_materials[key]["batch_no"][batch_no] -= qty
 					return
 
 				elif qty > 0 and batch_qty > 0:
@@ -300,7 +371,7 @@
 					new_rm_obj = self.append(self.raw_material_table, bom_item)
 					new_rm_obj.reference_name = item_row.name
 					self.__set_batch_no_as_per_qty(item_row, new_rm_obj, batch_no, batch_qty)
-					self.available_materials[key]['batch_no'][batch_no] = 0
+					self.available_materials[key]["batch_no"][batch_no] = 0
 
 			if abs(qty) > 0 and not new_rm_obj:
 				self.__set_consumed_qty(rm_obj, qty)
@@ -313,29 +384,35 @@
 		rm_obj.consumed_qty = consumed_qty
 
 	def __set_batch_no_as_per_qty(self, item_row, rm_obj, batch_no, qty):
-		rm_obj.update({'consumed_qty': qty, 'batch_no': batch_no,
-			'required_qty': qty, 'purchase_order': item_row.purchase_order})
+		rm_obj.update(
+			{
+				"consumed_qty": qty,
+				"batch_no": batch_no,
+				"required_qty": qty,
+				"purchase_order": item_row.purchase_order,
+			}
+		)
 
 		self.__set_serial_nos(item_row, rm_obj)
 
 	def __set_serial_nos(self, item_row, rm_obj):
 		key = (rm_obj.rm_item_code, item_row.item_code, item_row.purchase_order)
-		if (self.available_materials.get(key) and self.available_materials[key]['serial_no']):
-			used_serial_nos = self.available_materials[key]['serial_no'][0: cint(rm_obj.consumed_qty)]
-			rm_obj.serial_no = '\n'.join(used_serial_nos)
+		if self.available_materials.get(key) and self.available_materials[key]["serial_no"]:
+			used_serial_nos = self.available_materials[key]["serial_no"][0 : cint(rm_obj.consumed_qty)]
+			rm_obj.serial_no = "\n".join(used_serial_nos)
 
 			# Removed the used serial nos from the list
 			for sn in used_serial_nos:
-				self.available_materials[key]['serial_no'].remove(sn)
+				self.available_materials[key]["serial_no"].remove(sn)
 
 	def set_consumed_qty_in_po(self):
 		# Update consumed qty back in the purchase order
-		if self.is_subcontracted != 'Yes':
+		if self.is_subcontracted != "Yes":
 			return
 
 		self.__get_purchase_orders()
 		itemwise_consumed_qty = defaultdict(float)
-		for doctype in ['Purchase Receipt', 'Purchase Invoice']:
+		for doctype in ["Purchase Receipt", "Purchase Invoice"]:
 			consumed_items, pr_items = self.__update_consumed_materials(doctype, return_consumed_items=True)
 
 			for row in consumed_items:
@@ -345,10 +422,12 @@
 		self.__update_consumed_qty_in_po(itemwise_consumed_qty)
 
 	def __update_consumed_qty_in_po(self, itemwise_consumed_qty):
-		fields = ['main_item_code', 'rm_item_code', 'parent', 'supplied_qty', 'name']
-		filters = {'docstatus': 1, 'parent': ('in', self.purchase_orders)}
+		fields = ["main_item_code", "rm_item_code", "parent", "supplied_qty", "name"]
+		filters = {"docstatus": 1, "parent": ("in", self.purchase_orders)}
 
-		for row in frappe.get_all('Purchase Order Item Supplied', fields = fields, filters=filters, order_by='idx'):
+		for row in frappe.get_all(
+			"Purchase Order Item Supplied", fields=fields, filters=filters, order_by="idx"
+		):
 			key = (row.rm_item_code, row.main_item_code, row.parent)
 			consumed_qty = itemwise_consumed_qty.get(key, 0)
 
@@ -356,10 +435,10 @@
 				consumed_qty = row.supplied_qty
 
 			itemwise_consumed_qty[key] -= consumed_qty
-			frappe.db.set_value('Purchase Order Item Supplied', row.name, 'consumed_qty', consumed_qty)
+			frappe.db.set_value("Purchase Order Item Supplied", row.name, "consumed_qty", consumed_qty)
 
 	def __validate_supplied_items(self):
-		if self.doctype not in ['Purchase Invoice', 'Purchase Receipt']:
+		if self.doctype not in ["Purchase Invoice", "Purchase Receipt"]:
 			return
 
 		for row in self.get(self.raw_material_table):
@@ -371,18 +450,20 @@
 			self.__validate_serial_no(row, key)
 
 	def __validate_batch_no(self, row, key):
-		if row.get('batch_no') and row.get('batch_no') not in self.__transferred_items.get(key).get('batch_no'):
-			link = get_link_to_form('Purchase Order', row.purchase_order)
+		if row.get("batch_no") and row.get("batch_no") not in self.__transferred_items.get(key).get(
+			"batch_no"
+		):
+			link = get_link_to_form("Purchase Order", row.purchase_order)
 			msg = f'The Batch No {frappe.bold(row.get("batch_no"))} has not supplied against the Purchase Order {link}'
 			frappe.throw(_(msg), title=_("Incorrect Batch Consumed"))
 
 	def __validate_serial_no(self, row, key):
-		if row.get('serial_no'):
-			serial_nos = get_serial_nos(row.get('serial_no'))
-			incorrect_sn = set(serial_nos).difference(self.__transferred_items.get(key).get('serial_no'))
+		if row.get("serial_no"):
+			serial_nos = get_serial_nos(row.get("serial_no"))
+			incorrect_sn = set(serial_nos).difference(self.__transferred_items.get(key).get("serial_no"))
 
 			if incorrect_sn:
 				incorrect_sn = "\n".join(incorrect_sn)
-				link = get_link_to_form('Purchase Order', row.purchase_order)
-				msg = f'The Serial Nos {incorrect_sn} has not supplied against the Purchase Order {link}'
+				link = get_link_to_form("Purchase Order", row.purchase_order)
+				msg = f"The Serial Nos {incorrect_sn} has not supplied against the Purchase Order {link}"
 				frappe.throw(_(msg), title=_("Incorrect Serial Number Consumed"))