usernames['wikidata']['wikidata'] = u'YourBot'
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-3-dafc61c81c8b> in <module>()
----> 1 usernames['wikidata']['wikidata'] = u'YourBot'

NameError: name 'usernames' is not defined