Remove the import hook when unloading the old pkg_resources modules

--HG--
branch : agronholm/remove-the-import-hook-when-unloading-th-1458177009332

1 files changed, 5 insertions, 0 deletions

diff --git a/ez_setup.py b/ez_setup.py
index 9715bdc7..4faa5218 100644
--- a/ez_setup.py
+++ b/ez_setup.py
@@ -192,6 +192,11 @@ def _conflict_bail(VC_err, version):
 
 
 def _unload_pkg_resources():
+    from pkg_resources.extern import VendorImporter
+    sys.meta_path = [importer for importer in sys.meta_path if
+                     not isinstance(importer, VendorImporter)]
+    del VendorImporter
+
     del_modules = [
         name for name in sys.modules
         if name.startswith('pkg_resources')