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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 help(self, print_output=True):
 """Calls the help RPC, which returns the list of RPC calls available. This RPC should normally be used in an interactive console environment where the output should be printed instead of returned. Otherwise, newlines will be escaped, which will make the output difficult to read. Args: print_output: A bool for whether the output should be printed. Returns: A str containing the help output otherwise None if print_output wasn't set. """

        help_text = self._rpc('help')
        if print_output:
            print(help_text)
        else:
            return help_text