Add default for URL

Author: Kimahriman

python/hdfs_native/__init__.py

@@ -88,7 +88,11 @@ def __exit__(self, *_args):
 
 class Client:
 
-    def __init__(self, url: Optional[str], config: Optional[Dict[str, str]] = None):
+    def __init__(
+        self,
+        url: Optional[str] = None,
+        config: Optional[Dict[str, str]] = None,
+    ):
         self.inner = RawClient(url, config)
 
     def get_file_info(self, path: str) -> "FileStatus":