'xmlrpc', 'xmlrpc_blogger' and
'xmlrpc_metaweblog' to the list of py['load_plugins']. You should put
the files xmlrpc_blogger.py and xmlrpc_metaweblog.py into a plugin
directory as specified by py['plugin_dirs'].
You also should set the configuration option py['xmlrpc_blogger_metaweblog'] = 'True'.