I am not getting any output in the Subset_soil_param.txt file

[Baloch]

I modified the code like this:

Grid_Cell_id = list(open('Grid_Cells.txt', "r"))
Subset_soil_param = open('subset_soil_param.txt', "w")


with open('original_soil_param.txt') as f:
    for line in f:
        a = line.split(' ')
        if a[1] in Grid_Cell_id:
            Subset_soil_param.write(line)

Subset_soil_param.close()

But I am still getting an empty file.