PoSproc.py

with open("/mnt/dev/lexicon.txt", "r") as file1, open("/mnt/dev/l.txt", "w") as file2:
    for line in file1:
        items = line.split("\t")
        if items[3].startswith("nn"):
            items[3] = "1"
        elif items[3].startswith("vv"):
            items[3] = "2"
        elif items[3].startswith("jj"):
            items[3] = "3"
        elif items[3].startswith("rr"):
            items[3] = "4"
        else:
            items[3] = "5"
        new = "\t".join(items)+"\n"
        file2.write(new)