fix: remove six imports and use py3 defaults

frappe/utils/__init__.py

@@ -18,8 +18,7 @@ from email.utils import formataddr, parseaddr
 from gzip import GzipFile
 from typing import Generator, Iterable
 
-from six import string_types, text_type
-from six.moves.urllib.parse import quote, urlparse
+from urllib.parse import quote, urlparse
 from werkzeug.test import Client
 
 import frappe
@@ -72,7 +71,7 @@ def get_formatted_email(user, mail=None):
 def extract_email_id(email):
 	"""fetch only the email part of the Email Address"""
 	email_id = parse_addr(email)[1]
-	if email_id and isinstance(email_id, string_types) and not isinstance(email_id, text_type):
+	if email_id and isinstance(email_id, str) and not isinstance(email_id, str):
 		email_id = email_id.decode("utf-8", "ignore")
 	return email_id
 
@@ -370,14 +369,14 @@ def get_site_url(site):
 
 def encode_dict(d, encoding="utf-8"):
 	for key in d:
-		if isinstance(d[key], string_types) and isinstance(d[key], text_type):
+		if isinstance(d[key], str) and isinstance(d[key], str):
 			d[key] = d[key].encode(encoding)
 
 	return d
 
 def decode_dict(d, encoding="utf-8"):
 	for key in d:
-		if isinstance(d[key], string_types) and not isinstance(d[key], text_type):
+		if isinstance(d[key], str) and not isinstance(d[key], str):
 			d[key] = d[key].decode(encoding, "ignore")
 
 	return d
@@ -644,7 +643,7 @@ def parse_json(val):
 	"""
 	Parses json if string else return
 	"""
-	if isinstance(val, string_types):
+	if isinstance(val, str):
 		val = json.loads(val)
 	if isinstance(val, dict):
 		val = frappe._dict(val)