I think you can get the equivalent of the cmd line 'python -v' option by using an environment variable, according to the documentation:
PYTHONVERBOSE
If this is set to a non-empty string it is equivalent to specifying the -v
option. If set to an integer, it is equivalent to specifying -v
multiple times.
But yes, as you say, if Glade crashes then it displays a window with crash dump info on all platforms except Solaris. The idea being that if you want to submit a bug, the crash dump info can be used to trace what went wrong, in the absence of a reproducible test case.