Replace each line containing a specific word from the first file with the line from the second file

Question

I have two txt files, the first one contains duplicated word "PACKAGES", i want to replace each "PACKAGES" word with a line from file 2

NEW FUSTAT TOURS
City
USA
Address
napolean
PACKAGES
Test TOURS
City
UK
Address
napolean
PACKAGES

Answer 1

Here's one way you could do it:

with open('file1.txt', encoding='utf-8') as f1:
    with open('file2.txt', encoding='utf-8') as f2:
        f2lines = iter(f2.readlines())
        for f1line in f1:
            if f1line.startswith('PACKAGES'):
                print(next(f2lines), end='')
            else:
                print(f1line, end='')