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-rw-r--r--Lib/test/test_urllib2.py6
-rw-r--r--Lib/urllib2.py6
-rw-r--r--Misc/NEWS3
3 files changed, 12 insertions, 3 deletions
diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
index 9934d3778b..96a7db9e34 100644
--- a/Lib/test/test_urllib2.py
+++ b/Lib/test/test_urllib2.py
@@ -1038,6 +1038,12 @@ class MiscTests(unittest.TestCase):
o = build_opener(urllib2.HTTPHandler())
self.opener_has_handler(o, urllib2.HTTPHandler)
+ # Issue2670: multiple handlers sharing the same base class
+ class MyOtherHTTPHandler(urllib2.HTTPHandler): pass
+ o = build_opener(MyHTTPHandler, MyOtherHTTPHandler)
+ self.opener_has_handler(o, MyHTTPHandler)
+ self.opener_has_handler(o, MyOtherHTTPHandler)
+
def opener_has_handler(self, opener, handler_class):
for h in opener.handlers:
if h.__class__ == handler_class:
diff --git a/Lib/urllib2.py b/Lib/urllib2.py
index 3578e7a0b9..50d7aaf204 100644
--- a/Lib/urllib2.py
+++ b/Lib/urllib2.py
@@ -447,14 +447,14 @@ def build_opener(*handlers):
FTPHandler, FileHandler, HTTPErrorProcessor]
if hasattr(httplib, 'HTTPS'):
default_classes.append(HTTPSHandler)
- skip = []
+ skip = set()
for klass in default_classes:
for check in handlers:
if isclass(check):
if issubclass(check, klass):
- skip.append(klass)
+ skip.add(klass)
elif isinstance(check, klass):
- skip.append(klass)
+ skip.add(klass)
for klass in skip:
default_classes.remove(klass)
diff --git a/Misc/NEWS b/Misc/NEWS
index b9ce278e3e..d66e26ce93 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -45,6 +45,9 @@ Core and builtins
Library
-------
+- Issue #2670: Fix a failure in urllib2.build_opener(), when passed two
+ handlers that derive the same default base class.
+
- Issue #2495: tokenize.untokenize now inserts a space between two consecutive
string literals; previously, ["" ""] was rendered as [""""], which is
incorrect python code.