Python and spacecraft onboard or ground control scripting

[M. J. Mix]

Is anyone using Python as a spacecraft ground system scripting
language, or onboard (embedded) language?

Pros and cons when compared with TCL or JAVAScript.  Just 
some real life, honest opinions.

The usual issues: reliability and maintenance effort in applications. 
Also, use as a scripting language by non-programmers. (I saw the post
on indenting, so I'm concerned about that.)