> Also, THE min("Infinity") is priniting "I".  Practically,
> the minimum value is "e" right ?

Sorry, I have no idea what "practically" means to you.  It's just a fact that all uppercase ASCII letters compare less than all lowercase ASCII letters:

>>> 'I' < 'e'
True
>>> 'Z' < 'a'
True

This isn't just Python - it's an industry-wide standard.  Look at any reference for the ASCII character set; for example, here:

http://www.asciitable.com/

Try posting about what you're trying to accomplish on the Python mailing list?  The issue tracker isn't the right place for tutorials.