Issue #378: Do not use internal importlib._bootstrap module.

CHANGES.txt

@@ -6,6 +6,7 @@ CHANGES
 17.0
 ----
 
+* Issue #378: Do not use internal importlib._bootstrap module.
 * Issue #390: Disallow console scripts with path separators in
   the name. Removes unintended functionality and brings behavior
   into parity wih pip.

pkg_resources/__init__.py

@@ -69,9 +69,9 @@ from os.path import isdir, split
 
 # Avoid try/except due to potential problems with delayed import mechanisms.
 if sys.version_info >= (3, 3) and sys.implementation.name == "cpython":
-    import importlib._bootstrap as importlib_bootstrap
+    import importlib.machinery as importlib_machinery
 else:
-    importlib_bootstrap = None
+    importlib_machinery = None
 
 try:
     import parser
@@ -1720,8 +1720,8 @@ class DefaultProvider(EggProvider):
 
 register_loader_type(type(None), DefaultProvider)
 
-if importlib_bootstrap is not None:
-    register_loader_type(importlib_bootstrap.SourceFileLoader, DefaultProvider)
+if importlib_machinery is not None:
+    register_loader_type(importlib_machinery.SourceFileLoader, DefaultProvider)
 
 
 class EmptyProvider(NullProvider):
@@ -2128,8 +2128,8 @@ def find_on_path(importer, path_item, only=False):
                         break
 register_finder(pkgutil.ImpImporter, find_on_path)
 
-if importlib_bootstrap is not None:
-    register_finder(importlib_bootstrap.FileFinder, find_on_path)
+if importlib_machinery is not None:
+    register_finder(importlib_machinery.FileFinder, find_on_path)
 
 _declare_state('dict', _namespace_handlers={})
 _declare_state('dict', _namespace_packages={})
@@ -2237,8 +2237,8 @@ def file_ns_handler(importer, path_item, packageName, module):
 register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
 register_namespace_handler(zipimport.zipimporter, file_ns_handler)
 
-if importlib_bootstrap is not None:
-    register_namespace_handler(importlib_bootstrap.FileFinder, file_ns_handler)
+if importlib_machinery is not None:
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
 
 
 def null_ns_handler(importer, path_item, packageName, module):