python 2.7 - how to test class private method in nosetest -

how test class private method in nosetest ?

my code

class txt(object):     """docstring txt"""     def __init__(self, im_file):         super(txt, self).__init__()         self.im_file = im_file      @classmethod     def __parse_config(cls, im_file):         line in im_file:             print(line)         pass 

my nosetest

class testtxt(object):     """docstring testtxt"""     @classmethod     def setup_class(cls):         cls.testing_file = '\n'.join([                 'rtsp_link: rtsp://172.19.1.101',             ])     def test_load(self):         txt.parse_config(stringio(self.testing_file))          pass 

you can access txt.__parse_config() private method prepending class name before method name: txt._txt__parse_config().

demo:

>>> class a(): ...     _private = 1 ...     __super_private = 2 ...  >>> a._private 1 >>> a.__super_private traceback (most recent call last):   file "<stdin>", line 1, in <module> attributeerror: class has no attribute '__super_private' >>> a._a__super_private 2 

for more info on happening, see what meaning of single- , double-underscore before object name?.

hope helps.