py3compat.py 文件源码

def b(s):
        # BSON and socket operations deal in binary data. In
        # python 3 that means instances of `bytes`. In python
        # 2.6 and 2.7 you can create an alias for `bytes` using
        # the b prefix (e.g. b'foo'). Python 2.4 and 2.5 don't
        # provide this marker so we provide this compat function.
        # In python 3.x b('foo') results in b'foo'.
        # See http://python3porting.com/problems.html#nicer-solutions
        return codecs.latin_1_encode(s)[0]