$ woof -U Traceback (most recent call last): File "/usr/local/bin/woof", line 31, in <module> import readline ImportError: /usr/local/lib/python2.7/lib-dynload/readline.so: Undefined symbol "rl_callback_sigcleanup"
Recently, I updated youtube-dl (see T1234), an action which pulled a Python update. This update doesn't seem binary compatible with the current readline library.