Defer import of zipp

Author: danielhollas

importlib_metadata/__init__.py

@@ -29,8 +29,6 @@
 from itertools import starmap
 from typing import Any, Iterable, List, Mapping, Match, Optional, Set, cast
 
-from zipp.compat.overlay import zipfile
-
 from . import _meta
 from ._collections import FreezableDefaultDict, Pair
 from ._compat import (
@@ -777,6 +775,8 @@ def children(self):
         return []
 
     def zip_children(self):
+        from zipp.compat.overlay import zipfile
+
         zip_path = zipfile.Path(self.root)
         names = zip_path.root.namelist()
         self.joinpath = zip_path.joinpath