Repository: jdepoix/youtube-transcript-api
File: youtube_transcript_api/_api.py (Python)

Code before:

        :param video_id: the youtube video id
        :type video_id: str
        :param languages: A list of language codes in a descending priority. For example, if this is set to ['de', 'en']
        it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if it fails to
        do so.
        :type languages: list[str]
        :param proxies: a dictionary mapping of http and https proxies to be used for the network requests
        :type proxies: {'http': str, 'https': str} - http://docs.python-requests.org/en/master/user/advanced/#proxies
        :param cookies: a string of the path to a text file containing youtube authorization cookies
        :type cookies: str
        :return: a list of dictionaries containing the 'text', 'start' and 'duration' keys
        :rtype [{'text': str, 'start': float, 'end': float}]:
        """
        return cls.list_transcripts(video_id, proxies, cookies).find_transcript(languages).fetch()
    
    @classmethod
    def load_cookies(cls, cookies):
        cj = {}
        try:
            cj = cookiejar.MozillaCookieJar()
            cj.load(cookies)
        except IOError as e:
            raise CookiePathInvalid
        except FileNotFoundError as e:
            raise CookiePathInvalid
        if not cj:
            raise CookiesInvalid
        return cj 


Review comment (suggestion):
you can catch `IOError` and `FileNotFoundError` at once since they both result in throwing `CookiePathInvalid`:
```python
except (IOError, FileNotFoundError):
    raise CookiePathInvalid(video_id)
```
also keeping a reference to the Exception (`as e`) isn't necessary as long as it isn't used.

Code after:

            YouTubeTranscriptApi.list_transcripts(video_id, proxies).find_transcript(languages).fetch()

        :param video_id: the youtube video id
        :type video_id: str
        :param languages: A list of language codes in a descending priority. For example, if this is set to ['de', 'en']
        it will first try to fetch the german transcript (de) and then fetch the english transcript (en) if it fails to
        do so.
        :type languages: list[str]
        :param proxies: a dictionary mapping of http and https proxies to be used for the network requests
        :type proxies: {'http': str, 'https': str} - http://docs.python-requests.org/en/master/user/advanced/#proxies
        :param cookies: a string of the path to a text file containing youtube authorization cookies
        :type cookies: str
        :return: a list of dictionaries containing the 'text', 'start' and 'duration' keys
        :rtype [{'text': str, 'start': float, 'end': float}]:
        """
        return cls.list_transcripts(video_id, proxies, cookies).find_transcript(languages).fetch()
    
    @classmethod
    def _load_cookies(cls, cookies, video_id):
        cookie_jar = {}
        try:
            cookie_jar = cookiejar.MozillaCookieJar()
            cookie_jar.load(cookies)
        except CookieLoadError:
            raise CookiePathInvalid(video_id)
        if not cookie_jar:
            raise CookiesInvalid(video_id)
        return cookie_jar