setupext.py 文件源码

def check(self):
        super(Tests, self).check()

        msgs = []
        msg_template = ('{package} is required to run the matplotlib test '
                        'suite. Please install it with pip or your preferred'
                        ' tool to run the test suite')

        bad_nose = msg_template.format(
            package='nose %s or later' % self.nose_min_version
        )
        try:
            import nose
            if is_min_version(nose.__version__, self.nose_min_version):
                msgs += ['using nose version %s' % nose.__version__]
            else:
                msgs += [bad_nose]
        except ImportError:
            msgs += [bad_nose]

        if sys.version_info >= (3, 3):
            msgs += ['using unittest.mock']
        else:
            try:
                import mock
                msgs += ['using mock %s' % mock.__version__]
            except ImportError:
                msgs += [msg_template.format(package='mock')]

        return ' / '.join(msgs)