tab_to_conll.py

from sys import stdin

if __name__ == '__main__':
    i = 1
    for line in stdin:
        if not line.strip():
            print()
            i = 1
            continue

        token, pos, dep, dep_label = line.strip().split()
        print("\t".join([
            str(i), token, '_', pos, pos, '_', dep, dep_label, '_', '_']))

        i += 1
 

-> https://maryszmary.github.io/ud-annotatrix/standalone/annotator.html