I have done something with my python installation, don't remember what exactly. But I am getting an error when I try to open python command line now:

richard@richard-desktop:~/projects/hello$ python

Traceback (most recent call last):

  File "/usr/lib/python2.7/site.py", line 562, in <module>

    main()

  File "/usr/lib/python2.7/site.py", line 544, in main

    known_paths = addusersitepackages(known_paths)

  File "/usr/lib/python2.7/site.py", line 271, in addusersitepackages

    user_site = getusersitepackages()

  File "/usr/lib/python2.7/site.py", line 246, in getusersitepackages

    user_base = getuserbase() # this will also set USER_BASE

  File "/usr/lib/python2.7/site.py", line 236, in getuserbase

    USER_BASE = get_config_var('userbase')

  File "/usr/lib/python2.7/sysconfig.py", line 577, in get_config_var

    return get_config_vars().get(name)

  File "/usr/lib/python2.7/sysconfig.py", line 476, in get_config_vars

    _init_posix(_CONFIG_VARS)

  File "/usr/lib/python2.7/sysconfig.py", line 344, in _init_posix

    raise IOError(msg)

IOError: invalid Python installation: unable to open /usr/lib/python2.7/config/Makefile (No such file or directory)

richard@richard-desktop:~/projects/hello$ 

Is there some way to fix this?