skip ambiguous isort modules

radicale/app/__init__.py

@@ -29,7 +29,6 @@ import datetime
 import io
 import logging
 import pkg_resources
-import posixpath
 import pprint
 import random
 import time
@@ -52,6 +51,8 @@ from radicale.app.put import ApplicationPutMixin
 from radicale.app.report import ApplicationReportMixin
 from radicale.log import logger
 
+import posixpath  # isort:skip
+
 VERSION = pkg_resources.get_distribution("radicale").version