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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 get_dict_definition(self, dict, get_list=False):
 """Get the definition name of the given dict. Args: dict: dict to test. get_list: if set to true, return a list of definition that match the body. if False, only return the first. Returns: The definition name or None if the dict does not match any definition. If get_list is True, return a list of definition_name. """

        list_def_candidate = []
        for definition_name in self.specification['definitions'].keys():
            if self.validate_definition(definition_name, dict):
                if not get_list:
                    return definition_name
                list_def_candidate.append(definition_name)
        if get_list:
            return list_def_candidate
        return None