diff_checker.py

import sys, difflib

def print_diff(ans_key, built_ans):

    # ans_key is longer than built_ans

  
    # with open(ans_key) as file_1:
    #     file_1_text = file_1.readlines()
    
    # with open(built_ans) as file_2:
    #     file_2_text = file_2.readlines()
    
    # results = []
    # # Find and print the diff:
    # for line in difflib.unified_diff(
    #         file_1_text, file_2_text, fromfile=ans_key, 
    #         tofile=built_ans, lineterm=''):
    #     print(line)
    #     results.append(line)

    with open(ans_key) as file_1, open(built_ans) as file_2:
        differ = difflib.Differ()
  
        for line in differ.compare(file_1.readlines(), file_2.readlines()):
            print(line)
    
    # with open('diffs.txt', 'w', encoding='utf-8') as file_0: # output_file = open('test_output.pos', 'a', encoding='utf-8')
    #     for res in results:
    #         file_0.write(res)
    
    # file_0.close()
    file_1.close()
    file_2.close()


if __name__ == '__main__':
    #print('enter: python3 diff_checker.py WSJ_24.pos test_output.pos')
    ans_key = sys.argv[1]  # f1: WSJ_24.pos, etc.
    built_ans= sys.argv[2] # f2: our program-generated results

    
    print_diff(ans_key, built_ans)
    print("done")