如何以编程方式设置文档字符串？

我会将文档字符串传递给工厂函数，并用于

type

def make_testcase(filename, myfunc, docstring):    def test_something(self):        data = loadmat(filename)        result = myfunc(data)        self.assertTrue(result > 0)    clsdict = {'test_something': test_something,    '__doc__': docstring}    return type('ATest', (unittest.TestCase,), clsdict)MyTest = makeTestCase('some_filename', my_func, 'This is a docstring')