Fabian added the comment:
Looking further into this issue, OrderedDict.pop() using the key returned from
the KeyError (using eval(str(error))) also yields a KeyError. And
OrderedDict.popitem() does not change the dictionary (so it's not like the
KeyError is raised even though it worked).
Also it appears to be empty actually. list(OrderedDict) returns an empty list
even though str(OrderedDict) does not. So maybe some operations do only remove
entries from one part of the data so that popitem() still thinks it's in the
cache. Now I'm not familiar with urllib3 so I'm not sure how that internal
OrderedDict is used to narrow down what might cause that issue.
And additionally I tried to output keys(), items() and values() separately and
suddenly I get a KeyError even when I just do str():
conn = self.poolmanager.connection_from_url(url)
File
"/home/xzise/.pyenv/versions/3.6-dev/lib/python3.6/site-packages/requests/packages/urllib3/poolmanager.py",
line 139, in connection_from_url
return self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
File
"/home/xzise/.pyenv/versions/3.6-dev/lib/python3.6/site-packages/requests/packages/urllib3/poolmanager.py",
line 125, in connection_from_host
self.pools[pool_key] = pool
File
"/home/xzise/.pyenv/versions/3.6-dev/lib/python3.6/site-packages/requests/packages/urllib3/_collections.py",
line 66, in __setitem__
__before = str(self._container)
KeyError: ('https', 'ru.wikipedia.org', 443)
----------
title: OrderedDict.popitem() raises KeyError -> OrderedDict.popitem()/__str__()
raises KeyError
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue24667>
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