setup.py 文件源码

def run(self):
        if self.verbosity > 0:
            # ensure that deprecation warnings are displayed during testing
            # the following state is assumed:
            # logging.capturewarnings is true
            # a "default" level warnings filter has been added for
            # DeprecationWarning. See django.conf.LazySettings._configure_logging
            logger = logging.getLogger('py.warnings')
            handler = logging.StreamHandler()
            logger.addHandler(handler)
        TestCommand.run(self)
        if self.verbosity > 0:
            # remove the testing-specific handler
            logger.removeHandler(handler)