delete a specific line in txt file if it consist a special word

Question

i ask for a input, if that input was in a line of my txt file, delete just that line

w = input("Enter STnumber: ")
with open("student.txt ", "r") as f:
     lines = f.readlines()
     with open('student.txt','w') as f:
         for line in lines:
             if w in line :
                 # (i cant undrstand here)

these will clear all of my txt file actually its a name , lastname and a number in the txt file, like this jon sina 1234

if w = 1234, delete just the line with a number 1234

Does your code not work? Are you getting an error, warning, or unexpected behavior? If unexpected, what is supposed to be the output and what are you getting? Please read [How to ask a question](https://stackoverflow.com/help/how-to-ask) — blackbrandt, Jul 06 '22 at 11:39

score 2 · Accepted Answer · answered Jul 06 '22 at 11:50

If you want to remove lines from a text file that contain a certain pattern then you could do this:

with open('foo.txt', 'r+') as foo:
    lines = foo.readlines()
    foo.seek(0)
    for line in lines:
        if not 'Pattern' in line:
            foo.write(line)
    foo.truncate()

delete a specific line in txt file if it consist a special word

1 Answers1