__init__.py 文件源码

def _some_str(value):
    try:
        if PY2:
            # If there is a working __unicode__, great.
            # Otherwise see if we can get a bytestring...
            # Otherwise we fallback to unprintable.
            try:
                return unicode(value)
            except:
                return "b%s" % repr(str(value))
        else:
            # For Python3, bytestrings don't implicit decode, so its trivial.
            return str(value)
    except:
        return '<unprintable %s object>' % type(value).__name__

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