test_os.py 文件源码

def setUp(self):
            if support.TESTFN_UNENCODABLE:
                self.dir = support.TESTFN_UNENCODABLE
            else:
                self.dir = support.TESTFN
            self.bdir = os.fsencode(self.dir)

            bytesfn = []
            def add_filename(fn):
                try:
                    fn = os.fsencode(fn)
                except UnicodeEncodeError:
                    return
                bytesfn.append(fn)
            add_filename(support.TESTFN_UNICODE)
            if support.TESTFN_UNENCODABLE:
                add_filename(support.TESTFN_UNENCODABLE)
            if not bytesfn:
                self.skipTest("couldn't create any non-ascii filename")

            self.unicodefn = set()
            os.mkdir(self.dir)
            try:
                for fn in bytesfn:
                    f = open(os.path.join(self.bdir, fn), "w")
                    f.close()
                    fn = os.fsdecode(fn)
                    if fn in self.unicodefn:
                        raise ValueError("duplicate filename")
                    self.unicodefn.add(fn)
            except:
                shutil.rmtree(self.dir)
                raise