xlutils.copy changing celll colors

[Daler Boboev]

Hi, friends.

I'm trying to edit .xls file with xlutils and i have some issue that i can't handle.

With this code:

from xlrd import open_workbook
from xlutils.copy import copy

wb = open_workbook(file, formatting_info=True, on_demand=True)
wb_wt = copy(wb)

# do some things with cells

wb_wt.save(new_file_name)

i'm getting this result:

source file with formatting

output file with formatting

how can i fix this?

P.S. I'm not editing this cells with script.