Z:\testing\pywikipedia>python login.py
Checked for running processes. 3 processes currently running, including the current process.
Please create a file user-config.py, and put in there:

One line saying "mylang='language'"
One line saying "usernames['wikipedia']['language']='yy'"

...filling in your username and the language code of the wiki you want to work
on.

For other possible configuration variables check config.py.