https://github.com/python/cpython/commit/75a1cbdd38b142b359849eae16a2ecc12f6b3881
commit: 75a1cbdd38b142b359849eae16a2ecc12f6b3881
branch: main
author: Petr Viktorin <[email protected]>
committer: encukou <[email protected]>
date: 2025-10-30T12:14:17+01:00
summary:
gh-140748: socket_helper.transient_internet: Unwrap UrlError.__cause__
(GH-140749)
files:
M Lib/test/support/socket_helper.py
diff --git a/Lib/test/support/socket_helper.py
b/Lib/test/support/socket_helper.py
index 87941ee1791b4e..a41e487f3e4bc5 100644
--- a/Lib/test/support/socket_helper.py
+++ b/Lib/test/support/socket_helper.py
@@ -259,6 +259,10 @@ def filter_error(err):
# raise OSError('socket error', msg) from msg
elif len(a) >= 2 and isinstance(a[1], OSError):
err = a[1]
+ # The error can also be wrapped as __cause__:
+ # raise URLError(f"ftp error: {exp}") from exp
+ elif isinstance(err, urllib.error.URLError) and err.__cause__:
+ err = err.__cause__
else:
break
filter_error(err)
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