chore: remove past module dependencies

erpnext/accounts/doctype/tax_rule/tax_rule.py

@@ -10,7 +10,6 @@ from frappe.contacts.doctype.address.address import get_default_address
 from frappe.model.document import Document
 from frappe.utils import cint, cstr
 from frappe.utils.nestedset import get_root_of
-from past.builtins import cmp
 from six import iteritems
 
 from erpnext.setup.doctype.customer_group.customer_group import get_parent_customer_groups
@@ -170,6 +169,10 @@ def get_tax_template(posting_date, args):
 		for key in args:
 			if rule.get(key): rule.no_of_keys_matched += 1
 
+	def cmp(a, b):
+		# refernce: https://docs.python.org/3.0/whatsnew/3.0.html#ordering-comparisons
+		return int(a > b) - int(a < b)
+
 	rule = sorted(tax_rule,
 		key = functools.cmp_to_key(lambda b, a:
 		cmp(a.no_of_keys_matched, b.no_of_keys_matched) or

erpnext/accounts/report/financial_statements.py

@@ -10,7 +10,6 @@ import re
 import frappe
 from frappe import _
 from frappe.utils import add_days, add_months, cint, cstr, flt, formatdate, get_first_day, getdate
-from past.builtins import cmp
 from six import itervalues
 
 from erpnext.accounts.doctype.accounting_dimension.accounting_dimension import (
@@ -343,7 +342,7 @@ def sort_accounts(accounts, is_root=False, key="name"):
 	def compare_accounts(a, b):
 		if re.split(r'\W+', a[key])[0].isdigit():
 			# if chart of accounts is numbered, then sort by number
-			return cmp(a[key], b[key])
+			return int(a[key] > b[key]) - int(a[key] < b[key])
 		elif is_root:
 			if a.report_type != b.report_type and a.report_type == "Balance Sheet":
 				return -1
@@ -355,7 +354,7 @@ def sort_accounts(accounts, is_root=False, key="name"):
 				return -1
 		else:
 			# sort by key (number) or name
-			return cmp(a[key], b[key])
+			return int(a[key] > b[key]) - int(a[key] < b[key])
 		return 1
 
 	accounts.sort(key = functools.cmp_to_key(compare_accounts))

erpnext/setup/doctype/company/company.py

@@ -2,7 +2,6 @@
 # License: GNU General Public License v3. See license.txt
 
 
-import functools
 import json
 import os
 
@@ -13,7 +12,6 @@ from frappe.cache_manager import clear_defaults_cache
 from frappe.contacts.address_and_contact import load_address_and_contact
 from frappe.utils import cint, formatdate, get_timestamp, today
 from frappe.utils.nestedset import NestedSet
-from past.builtins import cmp
 
 from erpnext.accounts.doctype.account.account import get_account_currency
 from erpnext.setup.setup_wizard.operations.taxes_setup import setup_taxes_and_charges
@@ -583,7 +581,7 @@ def get_default_company_address(name, sort_key='is_primary_address', existing_ad
 			return existing_address
 
 	if out:
-		return sorted(out, key = functools.cmp_to_key(lambda x,y: cmp(y[1], x[1])))[0][0]
+		return min(out, key=lambda x: x[1])[0]  # find min by sort_key
 	else:
 		return None