tempfile.py 文件源码

def mkdtemp(suffix="", prefix=template, dir=None):
    """User-callable function to create and return a unique temporary
    directory.  The return value is the pathname of the directory.

    Arguments are as for mkstemp, except that the 'text' argument is
    not accepted.

    The directory is readable, writable, and searchable only by the
    creating user.

    Caller is responsible for deleting the directory when done with it.
    """

    if dir is None:
        dir = gettempdir()

    names = _get_candidate_names()

    for seq in xrange(TMP_MAX):
        name = names.next()
        file = _os.path.join(dir, prefix + name + suffix)
        try:
            _os.mkdir(file, 0700)
            return file
        except OSError, e:
            if e.errno == _errno.EEXIST:
                continue # try again
            if (_os.name == 'nt' and e.errno == _errno.EACCES and
                _os.path.isdir(dir) and _os.access(dir, _os.W_OK)):
                # 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 directory name found")