fix(py3): Convert list to filter for indexing
diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
index 11b0a6d..a91eaa6 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
@@ -346,7 +346,7 @@
if len(pricing_rules) > 1:
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 = filter(lambda x: x.for_price_list==args.price_list, pricing_rules) \
+ 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: