commit 44b548dda872c0d4f30afd6b44fd74b053a55ad8
author R David Murray <rdmurray@bitdance.com> Thu Sep 08 13:59:53 2016 -0400
committer R David Murray <rdmurray@bitdance.com> Thu Sep 08 13:59:53 2016 -0400
tree b3c1ff8485bc279000f9db95491ebc69a4385876
parent 513d7478a136e7646075592da2593476299cc8be

#27364: fix "incorrect" uses of escape character in the stdlib.

And most of the tools.

Patch by Emanual Barry, reviewed by me, Serhiy Storchaka, and
Martin Panter.

Lib/ftplib.py

diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index 2ab1d56..ee2a137 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -821,7 +821,7 @@
     if _150_re is None:
         import re
         _150_re = re.compile(
-            "150 .* \((\d+) bytes\)", re.IGNORECASE | re.ASCII)
+            r"150 .* \((\d+) bytes\)", re.IGNORECASE | re.ASCII)
     m = _150_re.match(resp)
     if not m:
         return None