Write to multiple file objects

[hadim]

(Maybe somehow related to #737 and #313)

Consider the following code from #313 :

class TqdmToLogger(io.StringIO):
    """
        Output stream for TQDM which will output to logger module instead of
        the StdOut.
    """
    logger = None
    level = None
    buf = ''
    def __init__(self,logger,level=None):
        super(TqdmToLogger, self).__init__()
        self.logger = logger
        self.level = level or logging.INFO
    def write(self,buf):
        self.buf = buf.strip('\r\n\t ')
    def flush(self):
        self.logger.log(self.level, self.buf)

if __name__ == "__main__":
    logging.basicConfig(format='%(asctime)s [%(levelname)-8s] %(message)s')
    logger = logging.getLogger()
    logger.setLevel(logging.DEBUG)

    tqdm_out = TqdmToLogger(logger,level=logging.INFO)
    for x in tqdm(range(100),file=tqdm_out,mininterval=30,):
        time.sleep(.5)

Would that be possible to write to both sys.stdout (or sys.stderr depending on the context) AND TqdmToLogger?

I tried to write to sys.stdout directly in TqdmToLogger but tqdm seems to do some fancy things when self.fp is sys.stdout or sys.stderr.