AttributeError: type object 'HTTPConnectionPool' has no attribute 'ConnectionCls'

Question

When running nosetests, using Flask-test I keep getting this error:

File "/app/env/local/lib/python2.7/site-packages/twill/browser.py", line 33, in __init__
    cpl.HTTPConnectionPool.old_http = cpl.HTTPConnectionPool.ConnectionCls
AttributeError: type object 'HTTPConnectionPool' has no attribute 'ConnectionCls'

Also when trying to run twill-sh I get the same error.

Answer 1

The problem is that the version of twill that you are currently using requires a more up-to-date version of the requests library. You should either upgrade requests, via

pip install requests --upgrade

Or downgrade twill, via:

pip uninstall twill
pip install -e git+https://github.com/ctb/twill/@79fa302814715a51e6b117eeee0defd2942af3b6#egg=twill