为什么我的 Unicode 中的 RegEx 模式不起作用？

Question

import re
file = open('C:\item.bh.txt', 'r', encoding = 'utf-16')
pattern = re.findall(ur'[\u09ac][\u0995]', file)

It shows the following error:

 File "<ipython-input-22-bbd94837f9ee>", line 1 pattern = re.findall(ur'[\ব][\ক]', file) ^ SyntaxError: invalid syntax

Answer 1

It doesn't make sense to have a raw unicode string here as you want the escape sequences to be interpreted. Second re.findall takes a string, not a file, so you have to read the file. The character classes are also not needed because they contain only a single character.

re.findall(u'\u09ac\u0995', file.read())

Or in context:

import re
file = open(r'C:\item.bh.txt', 'r', encoding = 'utf-16')
pattern = re.findall(u'\u09ac\u0995', file.read())