Is Python your only programming language?

[Van Gale]

 From my point of view (writing system applications, servers, web apps) 
Python and Java fill the same space, which is one reason I don't know 
much Java.

I used to use perl + shell for sysadmin type stuff, but now use Python 
exclusively for that (well... maybe some shell still for really really 
short scripts).

So, the only other language I really use is C (and not just for writing 
extensions).

There are some areas where I would consider other languages,  For 
example I would consider using Delphi for Windows GUI apps.  For Linux 
GUI apps I might consider Objective C just for something different, but 
most likely would choose Python and either Qt or GTK bindings.