I originally have python 2.6 and installed 2.7 and want to use pip to install some libraries like futures (with an s :)). Unfortunately, it seems like pip's libraries has been messed up. When type pip on the command line it produces this error:
ImportError: /usr/local/lib/python2.7/lib-dynload/array.so: undefined symbol: PyUnicodeUCS2_FromUnicode