Compare two Files line by line in Python - GeeksforGeeks

# Open File in Read Mode
file_1 = open('file1.txt', 'r')
file_2 = open('file2.txt', 'r')
  
print("Comparing files ", " @ " + 'file1.txt', " # " + 'file2.txt', sep='\n')
  
file_1_line = file_1.readline()
file_2_line = file_2.readline()
  
# Use as a COunter
line_no = 1
  
print()
  
with open('file1.txt') as file1:
    with open('file2.txt') as file2:
        same = set(file1).intersection(file2)
  
print("Common Lines in Both Files")
  
for line in same:
    print(line, end='')
  
print('\n')
print("Difference Lines in Both Files")
while file_1_line != '' or file_2_line != '':
  
    # Removing whitespaces
    file_1_line = file_1_line.rstrip()
    file_2_line = file_2_line.rstrip()
  
    # Compare the lines from both file
    if file_1_line != file_2_line:
        
        # otherwise output the line on file1 and use @ sign
        if file_1_line == '':
            print("@", "Line-%d" % line_no, file_1_line)
        else:
            print("@-", "Line-%d" % line_no, file_1_line)
              
        # otherwise output the line on file2 and use # sign
        if file_2_line == '':
            print("#", "Line-%d" % line_no, file_2_line)
        else:
            print("#+", "Line-%d" % line_no, file_2_line)
  
        # Print a empty line
        print()
  
    # Read the next line from the file
    file_1_line = file_1.readline()
    file_2_line = file_2.readline()
  
    line_no += 1
  
file_1.close()
file_2.close()