pickletester.py 文件源码

def test_load_classic_instance(self):
        # See issue5180.  Test loading 2.x pickles that
        # contain an instance of old style class.
        for X, args in [(C, ()), (D, ('x',)), (E, ())]:
            xname = X.__name__.encode('ascii')
            # Protocol 0 (text mode pickle):
            """
             0: (    MARK
             1: i        INST       '__main__ X' (MARK at 0)
            13: p    PUT        0
            16: (    MARK
            17: d        DICT       (MARK at 16)
            18: p    PUT        1
            21: b    BUILD
            22: .    STOP
            """
            pickle0 = ("(i__main__\n"
                       "X\n"
                       "p0\n"
                       "(dp1\nb.").replace('X', xname)
            self.assert_is_copy(X(*args), self.loads(pickle0))

            # Protocol 1 (binary mode pickle)
            """
             0: (    MARK
             1: c        GLOBAL     '__main__ X'
            13: q        BINPUT     0
            15: o        OBJ        (MARK at 0)
            16: q    BINPUT     1
            18: }    EMPTY_DICT
            19: q    BINPUT     2
            21: b    BUILD
            22: .    STOP
            """
            pickle1 = ('(c__main__\n'
                       'X\n'
                       'q\x00oq\x01}q\x02b.').replace('X', xname)
            self.assert_is_copy(X(*args), self.loads(pickle1))

            # Protocol 2 (pickle2 = '\x80\x02' + pickle1)
            """
             0: \x80 PROTO      2
             2: (    MARK
             3: c        GLOBAL     '__main__ X'
            15: q        BINPUT     0
            17: o        OBJ        (MARK at 2)
            18: q    BINPUT     1
            20: }    EMPTY_DICT
            21: q    BINPUT     2
            23: b    BUILD
            24: .    STOP
            """
            pickle2 = ('\x80\x02(c__main__\n'
                       'X\n'
                       'q\x00oq\x01}q\x02b.').replace('X', xname)
            self.assert_is_copy(X(*args), self.loads(pickle2))