How to convert circled numbers to numbers ? (① to 1)

Question

I would like to convert numbers from a string I receive after an OCR recognition over Japanese text.

For example, when I extract a date:

③① 年 ⑫ 月 ①③ 日

I would like to convert it to:

31 年 12 月 13 日

What would be the best way to achieve it ?

Answer 1

I would use unicodedata

import unicodedata
print(unicodedata.normalize("NFKC","③① 年 ⑫ 月 ①③ 日"))

The result is this,

31 年 12 月 13 日

This also converts other variation of Japanese digits, full-width digits.

import unicodedata
print(unicodedata.normalize("NFKC","123①②③１２３"))

to

123123123