+def oauth2_dance(consumer_key, consumer_secret, token_filename=None):
+ """
+ Perform the OAuth2 dance to transform a consumer key and secret into a
+ bearer token.
+
+ If a token_filename is given, the bearer token will be written to
+ the file.
+ """
+ twitter = Twitter(
+ auth=OAuth2(consumer_key=consumer_key, consumer_secret=consumer_secret),
+ format="",
+ api_version="")
+ token = json.loads(twitter.oauth2.token(grant_type="client_credentials")
+ .encode("utf8"))["access_token"]
+ if token_filename:
+ write_bearer_token_file(token)
+ return token