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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 detect_alias_config_change(self):
 """ Change if the alias configuration has changed since the last run. Returns: False if the alias configuration file has not been changed since the last run. Otherwise, return True. """

        # Do not load the entire command table if there is a parse error
        if self.parse_error():
            return False

        alias_config_sha1 = hashlib.sha1(self.alias_config_str.encode('utf-8')).hexdigest()
        if alias_config_sha1 != self.alias_config_hash:
            # Overwrite the old hash with the new one
            self.alias_config_hash = alias_config_sha1
            return True
        return False