<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dict_key(self):
 """ Find the next key in a dict. We skip any newlines and check for if the dict has ended. """

        while True:
            token = self.next()
            t_value = token["value"]
            if t_value == "\n":
                continue
            if t_value == "}":
                raise self.ParseEnd()
            if token["type"] == "literal":
                return self.make_value(t_value)
            self.error("Invalid Key")