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-rw-r--r--setuptools/command/rotate.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/setuptools/command/rotate.py b/setuptools/command/rotate.py
index b89353f5..e398834f 100644
--- a/setuptools/command/rotate.py
+++ b/setuptools/command/rotate.py
@@ -36,8 +36,8 @@ class rotate(Command):
raise DistutilsOptionError("Must specify number of files to keep")
try:
self.keep = int(self.keep)
- except ValueError:
- raise DistutilsOptionError("--keep must be an integer")
+ except ValueError as e:
+ raise DistutilsOptionError("--keep must be an integer") from e
if isinstance(self.match, six.string_types):
self.match = [
convert_path(p.strip()) for p in self.match.split(',')