vv.py 文件源码

def replace_first_line(file, replacement):
    # suppress a type error which was confusing
    if type(file) is not InMemoryUploadedFile:
        with open(file, 'r', encoding='iso-8859-1') as f:
            data = f.readlines()

        if "!DOCTYPE" not in data[0]:
            data[0] = replacement
            with open(file, 'w') as f:
                f.writelines(data)