Line_by_line_file_comparison

# Open file for reading in text mode (default mode)
f1 = open("C:\CSCI\output.txt")
f2 = open("C:\CSCI\output1.txt")


# Read the first line from the files
f1_line = f1.readline()
f2_line = f2.readline()

# Initialize counter for line number
line_no = 1

# Loop if either file1 or file2 has not reached EOF
while f1_line != '' or f2_line != '':

    
    
    # Compare the lines from both file
    if f1_line != f2_line:
        
        # If a line does not exist on file2 then mark the output with + sign
        if f2_line == '' and f1_line != '':
            print(">+", "Line-%d" % line_no, f1_line)
        # otherwise output the line on file1 and mark it with > sign
        elif f1_line != '':
            print(">", "Line-%d" % line_no, f1_line)
            
        # If a line does not exist on file1 then mark the output with + sign
        #if f1_line == '' and f2_line != '':
            #print("<+", "Line-%d" % line_no, f2_line)
        # otherwise output the line on file2 and mark it with < sign
        #elif f2_line != '':
            #print("<", "Line-%d" %  line_no, f2_line)

        # Print a blank line
        print()

    #Read the next line from the file
    f1_line = f1.readline()
    f2_line = f2.readline()


    #Increment line counter
    line_no += 1

# Close the files
f1.close()
f2.close()