Copying from one text file to another using Python

Question

I would like to copy certain lines of text from one text file to another. In my current script when I search for a string it copies everything afterwards, how can I copy jus

Answer 1

If all of that did not work try this.

with open("hello.txt") as f:
with open("copy.txt", "w") as f1:
    for line in f:
        f1.write(line)

Answer 2

Just a slightly cleaned up way of doing this. This is no more or less performant than ATOzTOA's answer, but there's no reason to do two separate with statements.

with open(path_1, 'a') as file_1, open(path_2, 'r') as file_2:
    for line in file_2:
        if 'tests/file/myword' in line:
            file_1.write(line)