there is error when i use byte

[sjqzhang]

error:
charset=re.compile(b'<meta[^>]charset=['"]?([a-z0-8-]+)['"]?[^>]?>',re.IGNORECASE).findall(html)
correct:
charset=re.compile(r'<meta[^>]charset=['"]?([a-z0-8-]+)['"]?[^>]?>',re.IGNORECASE).findall(html)