_logging.py 文件源码

def get_logger(name):
    """
    Return a :class:`~py:logging.Logger` object with the specified name.

    A :class:`~py:logging.NullHandler` handler is added to the logger if it
    does not have any handlers yet and if it is not the Python root logger.
    This prevents the propagation of log requests up the Python logger
    hierarchy, and therefore causes this package to be silent by default.
    """
    logger = logging.getLogger(name)
    if name != '' and not logger.handlers:
        logger.addHandler(logging.NullHandler())
    return logger