Python re matching fails to work for extened unicode range

import re

pat = re.compile(r"[\u20000-\u2A6D6]+")

pat.match("Hello World!")

This will give us a result

<re.Match object; span=(0, 5), match='Hello'>

But in fact, the input string here is fully ASCII which is not from the unicode range.

Is this expected? If so, how to compile those unicode range in practice?

>Solution :

The pattern currently describes a character class consisting of either \u2000, any character in the range 0-\u2A6D or 6.

For python character literals that are wider than 2 bytes, you need to use the escape sequence \U with 8 hex digits:

pat = re.compile(r"[\U00020000-\U0002A6D6]+")