Python日志记录，如何将信息写入2个单独的

Question

我正在尝试登录到不同的 StringIO。我希望每个记录器都会写入实例化并给予的每个 StringIO。但这不起作用，只有第一个 StringIO 存储记录的信息。对我缺少的内容有什么建议吗？

    import logging
    from StringIO import StringIO
    formatter = logging.Formatter('%(asctime)s %(name)-3s %(levelname)-4s %(message)s')

    log_stream1 = StringIO()
    log1 = logging.getLogger('a')
    log1.setLevel(logging.DEBUG)
    stream_handler1 = logging.StreamHandler(log_stream1)
    stream_handler1.setLevel(logging.INFO)
    stream_handler1.setFormatter(formatter)
    log1.addHandler(stream_handler1)

    log_stream2 = StringIO()
    log2 = logging.getLogger('b')
    log2.setLevel(logging.DEBUG)
    stream_handler2 = logging.StreamHandler(log_stream2)
    stream_handler2.setLevel(logging.INFO)
    stream_handler2.setFormatter(formatter)
    log2.addHandler(stream_handler1)

    log1.info('log1')
    log2.info('log2')

输出:

    In [6]: log_stream1.getvalue()
    Out[6]: '2017-06-08 10:05:12,468 a   INFO log1\n2017-06-08 10:05:12,468 b   INFO log2\n'

    In [7]: log_stream2.getvalue()
    Out[7]: ''

Answer 1

改变

log2.addHandler(stream_handler1)

至

log2.addHandler(stream_handler2)

整个代码:

import logging
from StringIO import StringIO
formatter = logging.Formatter('%(asctime)s %(name)-3s %(levelname)-4s %(message)s')

log_stream1 = StringIO()
log1 = logging.getLogger('a')
log1.setLevel(logging.DEBUG)
stream_handler1 = logging.StreamHandler(log_stream1)
stream_handler1.setLevel(logging.INFO)
stream_handler1.setFormatter(formatter)
log1.addHandler(stream_handler1)

log_stream2 = StringIO()
log2 = logging.getLogger('b')
log2.setLevel(logging.DEBUG)
stream_handler2 = logging.StreamHandler(log_stream2)
stream_handler2.setLevel(logging.INFO)
stream_handler2.setFormatter(formatter)
log2.addHandler(stream_handler2)

log1.info('log1')
log2.info('log2')