removed Popen encoding argument (worked only on 3.6)
@@ -570,7 +570,7 @@ def _create_pip_process(args):
creationflags = subprocess.CREATE_NEW_PROCESS_GROUP
return (subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
- env=env, universal_newlines=True, encoding=encoding,
+ env=env, universal_newlines=True,
creationflags=creationflags),
cmd)
