unicode.py 文件源码

def out_u(s):
    '''Return unicode string suitable for displaying

    Unlike other functions assumes get_preferred_output_encoding() first. Unlike 
    u() does not throw exceptions for invalid unicode strings. Unlike 
    safe_unicode() does throw an exception if object is not a string.
    '''
    if isinstance(s, unicode):
        return s
    elif isinstance(s, bytes):
        return unicode(s, get_preferred_output_encoding(), 'powerline_decode_error')
    else:
        raise TypeError('Expected unicode or bytes instance, got {0}'.format(repr(type(s))))