Don't use the vendored concurrent.futures when it's available in stdlib.

pypa · Sep 20, 2016 · b6abba0 · b6abba0
1 parent 6f9ada4
commit b6abba0
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/pip/req/req_set.py b/pip/req/req_set.py
@@ -6,7 +6,10 @@
 
 from pip._vendor import pkg_resources
 from pip._vendor import requests
-from pip._vendor.concurrent.futures.thread import ThreadPoolExecutor
+try:
+    from concurrent.futures.thread import ThreadPoolExecutor
+except ImportError:
+    from pip._vendor.concurrent.futures.thread import ThreadPoolExecutor
 from pip.compat import expanduser
 from pip.download import (is_file_url, is_dir_url, is_vcs_url, url_to_path,
                           unpack_url)