Source code for nltk.twitter.util

# Natural Language Toolkit: Twitter client
#
# Copyright (C) 2001-2022 NLTK Project
# Author: Ewan Klein <ewan@inf.ed.ac.uk>
#         Lorenzo Rubio <lrnzcig@gmail.com>
# URL: <https://www.nltk.org/>
# For license information, see LICENSE.TXT

"""
Authentication utilities to accompany `twitterclient`.
"""

import os
import pprint

from twython import Twython


[docs]def credsfromfile(creds_file=None, subdir=None, verbose=False): """ Convenience function for authentication """ return Authenticate().load_creds( creds_file=creds_file, subdir=subdir, verbose=verbose )
[docs]class Authenticate: """ Methods for authenticating with Twitter. """
[docs] def __init__(self): self.creds_file = "credentials.txt" self.creds_fullpath = None self.oauth = {} try: self.twitter_dir = os.environ["TWITTER"] self.creds_subdir = self.twitter_dir except KeyError: self.twitter_dir = None self.creds_subdir = None
[docs] def load_creds(self, creds_file=None, subdir=None, verbose=False): """ Read OAuth credentials from a text file. File format for OAuth 1:: app_key=YOUR_APP_KEY app_secret=YOUR_APP_SECRET oauth_token=OAUTH_TOKEN oauth_token_secret=OAUTH_TOKEN_SECRET File format for OAuth 2:: app_key=YOUR_APP_KEY app_secret=YOUR_APP_SECRET access_token=ACCESS_TOKEN :param str file_name: File containing credentials. ``None`` (default) reads data from `TWITTER/'credentials.txt'` """ if creds_file is not None: self.creds_file = creds_file if subdir is None: if self.creds_subdir is None: msg = ( "Supply a value to the 'subdir' parameter or" + " set the TWITTER environment variable." ) raise ValueError(msg) else: self.creds_subdir = subdir self.creds_fullpath = os.path.normpath( os.path.join(self.creds_subdir, self.creds_file) ) if not os.path.isfile(self.creds_fullpath): raise OSError(f"Cannot find file {self.creds_fullpath}") with open(self.creds_fullpath) as infile: if verbose: print(f"Reading credentials file {self.creds_fullpath}") for line in infile: if "=" in line: name, value = line.split("=", 1) self.oauth[name.strip()] = value.strip() self._validate_creds_file(verbose=verbose) return self.oauth
def _validate_creds_file(self, verbose=False): """Check validity of a credentials file.""" oauth1 = False oauth1_keys = ["app_key", "app_secret", "oauth_token", "oauth_token_secret"] oauth2 = False oauth2_keys = ["app_key", "app_secret", "access_token"] if all(k in self.oauth for k in oauth1_keys): oauth1 = True elif all(k in self.oauth for k in oauth2_keys): oauth2 = True if not (oauth1 or oauth2): msg = f"Missing or incorrect entries in {self.creds_file}\n" msg += pprint.pformat(self.oauth) raise ValueError(msg) elif verbose: print(f'Credentials file "{self.creds_file}" looks good')
[docs]def add_access_token(creds_file=None): """ For OAuth 2, retrieve an access token for an app and append it to a credentials file. """ if creds_file is None: path = os.path.dirname(__file__) creds_file = os.path.join(path, "credentials2.txt") oauth2 = credsfromfile(creds_file=creds_file) app_key = oauth2["app_key"] app_secret = oauth2["app_secret"] twitter = Twython(app_key, app_secret, oauth_version=2) access_token = twitter.obtain_access_token() tok = f"access_token={access_token}\n" with open(creds_file, "a") as infile: print(tok, file=infile)
[docs]def guess_path(pth): """ If the path is not absolute, guess that it is a subdirectory of the user's home directory. :param str pth: The pathname of the directory where files of tweets should be written """ if os.path.isabs(pth): return pth else: return os.path.expanduser(os.path.join("~", pth))