问tempfile.mkdtemp()在osx上的差异？

EN

import os
import tempfile
from contextlib import contextmanager

def test_cd_to_tempdir():
    initial_cwd = os.getcwd()
    abspath_tmpdir = tempfile.mkdtemp()
    try:
        assert os.path.isabs(abspath_tmpdir)
        os.chdir(abspath_tmpdir)
        curdir = os.getcwd()
        assert initial_cwd != curdir
        assert curdir == abspath_tmpdir
    finally:
        os.chdir(initial_cwd)      # must exit directory..
        os.rmdir(abspath_tmpdir)   # ..before it can be removed

        try:
            assert os.path.isabs(abspath_tmpdir)
            os.chdir(abspath_tmpdir)
            curdir = os.getcwd()
            assert initial_cwd != curdir
>           assert curdir == abspath_tmpdir
E           AssertionError: assert '/private/var...T/tmpoz7eo_yj' == '/var/folders/...T/tmpoz7eo_yj'
E             - /private/var/folders/17/5mc7816d3mndxjqgplq6057w0000gn/T/tmpoz7eo_yj
E             ? --------
E             + /var/folders/17/5mc7816d3mndxjqgplq6057w0000gn/T/tmpoz7eo_yj