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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_http_log_entry(self, string):
 """ Determines if a log entry is an HTTP-formatted log string or not. """

        # Debug event filter
        if 'Zappa Event' in string:
            return False

        # IP address filter
        for token in string.replace('\t', ' ').split(' '):
            try:
                if (token.count('.') is 3 and token.replace('.', '').isnumeric()):
                    return True
            except Exception: # pragma: no cover
                pass

        return False