'Returns only the text content of Tweets in the file(s)
:return: the given file(s) as a list of Tweets.
:rtype: list(str)'

def strings(self, fileids=None):

    fulltweets = self.docs(fileids)
    tweets = []
    for jsono in fulltweets:
        try:
            text = jsono['text']
            if isinstance(text, bytes):
                text = text.decode(self.encoding)
            tweets.append(text)
        except KeyError:
            pass
    return tweets
