Improve import time of pathlib

Author: hugovk

Lib/pathlib/__init__.py

@@ -12,12 +12,13 @@
 import posixpath
 import sys
 from errno import *
-from glob import _StringGlobber, _no_recurse_symlinks
 from itertools import chain
 from stat import (
     S_IMODE, S_ISDIR, S_ISREG, S_ISLNK, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO,
 )
 from _collections_abc import Sequence
+lazy import shutil
+lazy from glob import _StringGlobber, _no_recurse_symlinks
 
 try:
     import pwd
@@ -1255,8 +1256,6 @@ def _delete(self):
         if self.is_symlink() or self.is_junction():
             self.unlink()
         elif self.is_dir():
-            # Lazy import to improve module import time
-            import shutil
             shutil.rmtree(self)
         else:
             self.unlink()

Lib/test/test_pathlib/test_pathlib.py

@@ -84,7 +84,7 @@ def test_is_notimplemented(self):
 class LazyImportTest(unittest.TestCase):
     @cpython_only
     def test_lazy_import(self):
-        import_helper.ensure_lazy_imports("pathlib", {"shutil"})
+        import_helper.ensure_lazy_imports("pathlib", {"glob", "shutil"})
 
 
 #