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python - How to convert a string from CP-1251 to UTF-8?

I'm using mutagen to convert ID3 tags data from CP-1251/CP-1252 to UTF-8. In Linux there is no problem. But on Windows, calling SetValue() on a wx.TextCtrl produces the error:

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in range(128)

The original string (assumed to be CP-1251 encoded) that I'm pulling from mutagen is:

u'xc1xe5xebxe0xff xffxe1xebxfbxedxff xe3xf0xeexecxf3'

I've tried converting this to UTF-8:

dd = d.decode('utf-8')

...and even changing the default encoding from ASCII to UTF-8:

sys.setdefaultencoding('utf-8')

...But I get the same error.

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If you know for sure that you have cp1251 in your input, you can do

d.decode('cp1251').encode('utf8')

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