human
I wrote the below code

    def call_and_assert(key, data, errors, context=None):
        if (context is None):
            context = {}
        original_data = copy.deepcopy(data)
        original_errors = copy.deepcopy(errors)
        original_context = copy.deepcopy(context)
        result = validator(key, data, errors, context=context)
        assert (key not in data), 'Should    remove    key    from    data    dict    when    called    with:    key:    {key},    data:    {data},    errors:    {errors},    context:    {context}    '.format(key=key, data=original_data, errors=original_errors, context=original_context)
        return result
    return call_and_assert

What's a good function header?
assistant
#Here's a good function header.

def removes_key_from_data_dict(validator):