utils.py 文件源码

def write_data(fpath, data, modified, raise_err=True, tmp_dir=None):
    """Safely write data to file path.
    """
    tmp_dir = tmp_dir or os.path.dirname(fpath)
    with tempfile.NamedTemporaryFile(dir=tmp_dir,
                                     delete=False,
                                     prefix='.tmp') as temp:
        if data:
            temp.write(data)
        os.fchmod(temp.fileno(), 0o644)
    os.utime(temp.name, (modified, modified))
    try:
        os.rename(temp.name, fpath)
    except OSError:
        _LOGGER.error('Unable to rename: %s => %s', temp.name, fpath,
                      exc_info=True)
        if raise_err:
            raise