Python program to delete a specific line in a text file [duplicate]

Answer 1

You should check your logic and variable names. You're checking if lines[5] is not equal to line6, everytime in your loop. Which it is, because it IS that exact line. You want the check the current line:

if t == "dy":
    f = open("C:/Users/Sreeraj/Desktop/Thailand_Rectangle2_National Parks.txt","w")
    for line in lines:
        if line != line6: # <- Check actual line!
            f.write(line)

f.close()