How do I split one file into two files using Python? [closed]

Answer 1

A naive example (that doesn't load the file into memory like Sven's):

with open('file', 'r') as r:
    with open('file1', 'w') as f:
        for line in r:
            if line == 'string pattern\n':
                break
            f.write(line)
    with open('file2', 'w') as f:
        for line in r:
            f.write(line)

This assumes that 'string pattern' occurs once in the input file.

If the pattern isn't a fixed string, you can use the re module.