parse.py read mode uses deprecated 'U' mode

[trf-mp]

Hi there,

Line 141, 477, 584, 709 of parse.py contain with open(input_file, 'rU')

Open mode 'U' is deprecated and causes the script to fail on Python newer than 3.10 (I think), and potentially should be updated

Thank you!

[Goldthing]

I've had the same problem and have submitted a pull request here but can't seem to link it directly to the issue.