Comment 1 for bug 397969

This seems to be because the latest bundled distribution of pygobject for win32 is 2.14, which doesn't import get_application_name from glib in the gobject package. It's present as of 2.16 (in terms of stable releases).

Alas, the package by Kevin Light (with added win32 libraries) also suffers from this problem, even at the 0.96.0 version.