check if a_list already contains a_dict

dict_in_list.py

from json import dumps

def dict_in_list(a_dict, a_list):
    """
    check if a_list already contains a_dict
    """
    def dict_equals_dict(dict_a, dict_b):
        """
        check if all key-value-pairs of dict_a and dict_b are equal
        """
        return True if dumps(dict_b, sort_keys=True) is dumps(dict_b, sort_keys=True) else False

    return True if any(dict_equals_dict(a_dict, list_dict) for list_dict in a_list) else False