UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 10442: character maps to <undefined>

[INADA Naoki]

​> 1st is this script is from a library module online open source

If it's open source, why didn't you show the link to the soruce?
I assume your code is this:

https://github.com/siddharth2010/String-Search/blob/6770c7a1e811a5d812e7f9f7c5c83a12e5b28877/createIndex.py

And self.collFile is opened here:

https://github.com/siddharth2010/String-Search/blob/6770c7a1e811a5d812e7f9f7c5c83a12e5b28877/createIndex.py#L91

You need to add `encoding='utf-8'` argument.