Help needed with compiling python

[Cecil Westerhof]

I wanted to install python myself. I started with 2.7.10. If that
works I also will install 3.5.0.

I did:
    ./configure --prefix=/usr
    make
    make altinstall

I have:
    /usr/bin/python2.7

But when I execute this, I get:
    Could not find platform dependent libraries <exec_prefix>
    Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
    Python 2.7.10 (default, Nov 25 2015, 20:58:29) 
    [GCC 4.8.5] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    Traceback (most recent call last):
      File "/etc/pythonstart", line 7, in <module>
        import readline
    ImportError: No module named readline

What do I need to do to get it working?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof