tempfile.py 文件源码

def _mkstemp_inner(dir, pre, suf, flags):
    """Code common to mkstemp, TemporaryFile, and NamedTemporaryFile."""

    names = _get_candidate_names()

    for seq in xrange(TMP_MAX):
        name = names.next()
        file = _os.path.join(dir, pre + name + suf)
        try:
            fd = _os.open(file, flags, 0600)
            _set_cloexec(fd)
            return (fd, _os.path.abspath(file))
        except OSError, e:
            if e.errno == _errno.EEXIST:
                continue # try again
            if _os.name == 'nt' and e.errno == _errno.EACCES:
                # On windows, when a directory with the chosen name already
                # exists, EACCES error code is returned instead of EEXIST.
                continue
            raise

    raise IOError, (_errno.EEXIST, "No usable temporary file name found")


# User visible interfaces.