我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用__main__.C。
def create_data(): c = C() c.foo = 1 c.bar = 2 x = [0, 1, 2.0, 3.0+0j] # Append some integer test cases at cPickle.c's internal size # cutoffs. uint1max = 0xff uint2max = 0xffff int4max = 0x7fffffff x.extend([1, -1, uint1max, -uint1max, -uint1max-1, uint2max, -uint2max, -uint2max-1, int4max, -int4max, -int4max-1]) y = ('abc', 'abc', c, c) x.append(y) x.append(y) x.append(5) return x
def test_reduce_bad_iterator(self): # Issue4176: crash when 4th and 5th items of __reduce__() # are not iterators class C(object): def __reduce__(self): # 4th item is not an iterator return list, (), None, [], None class D(object): def __reduce__(self): # 5th item is not an iterator return dict, (), None, None, [] # Protocol 0 is less strict and also accept iterables. for proto in protocols: try: self.dumps(C(), proto) except (pickle.PickleError): pass try: self.dumps(D(), proto) except (pickle.PickleError): pass
def create_data(): c = C() c.foo = 1 c.bar = 2 x = [0, 1L, 2.0, 3.0+0j] # Append some integer test cases at cPickle.c's internal size # cutoffs. uint1max = 0xff uint2max = 0xffff int4max = 0x7fffffff x.extend([1, -1, uint1max, -uint1max, -uint1max-1, uint2max, -uint2max, -uint2max-1, int4max, -int4max, -int4max-1]) y = ('abc', 'abc', c, c) x.append(y) x.append(y) x.append(5) return x
def test_reduce_bad_iterator(self): # Issue4176: crash when 4th and 5th items of __reduce__() # are not iterators class C(object): def __reduce__(self): # 4th item is not an iterator return list, (), None, [], None class D(object): def __reduce__(self): # 5th item is not an iterator return dict, (), None, None, [] # Protocol 0 in Python implementation is less strict and also accepts # iterables. for proto in protocols: try: self.dumps(C(), proto) except (AttributeError, pickle.PicklingError, cPickle.PicklingError): pass try: self.dumps(D(), proto) except (AttributeError, pickle.PicklingError, cPickle.PicklingError): pass
def test_newobj_proxies(self): # NEWOBJ should use the __class__ rather than the raw type classes = myclasses[:] # Cannot create weakproxies to these classes for c in (MyInt, MyTuple): classes.remove(c) for proto in protocols: for C in classes: B = C.__base__ x = C(C.sample) x.foo = 42 p = weakref.proxy(x) s = self.dumps(p, proto) y = self.loads(s) self.assertEqual(type(y), type(x)) # rather than type(p) detail = (proto, C, B, x, y, type(y)) self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail) # Register a type with copyreg, with extension code extcode. Pickle # an object of that type. Check that the resulting pickle uses opcode # (EXT[124]) under proto 2, and not in proto 1.
def test_reduce_bad_iterator(self): # Issue4176: crash when 4th and 5th items of __reduce__() # are not iterators class C(object): def __reduce__(self): # 4th item is not an iterator return list, (), None, [], None class D(object): def __reduce__(self): # 5th item is not an iterator return dict, (), None, None, [] # Protocol 0 is less strict and also accept iterables. for proto in protocols: try: self.dumps(C(), proto) except (AttributeError, pickle.PickleError, cPickle.PickleError): pass try: self.dumps(D(), proto) except (AttributeError, pickle.PickleError, cPickle.PickleError): pass
def test_recursive_inst(self): i = C() i.attr = i for proto in protocols: s = self.dumps(i, 2) x = self.loads(s) self.assertEqual(dir(x), dir(i)) self.assertTrue(x.attr is x)
def test_recursive_multi(self): l = [] d = {1:l} i = C() i.attr = d l.append(i) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertEqual(len(x), 1) self.assertEqual(dir(x[0]), dir(i)) self.assertEqual(list(x[0].attr.keys()), [1]) self.assertTrue(x[0].attr[1] is x)
def test_newobj_generic(self): for proto in protocols: for C in myclasses: B = C.__base__ x = C(C.sample) x.foo = 42 s = self.dumps(x, proto) y = self.loads(s) detail = (proto, C, B, x, y, type(y)) self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail) # Register a type with copyreg, with extension code extcode. Pickle # an object of that type. Check that the resulting pickle uses opcode # (EXT[124]) under proto 2, and not in proto 1.
def test_recursive_inst(self): i = C() i.attr = i for proto in protocols: s = self.dumps(i, proto) x = self.loads(s) self.assertIsInstance(x, C) self.assertEqual(dir(x), dir(i)) self.assertIs(x.attr, x)
def test_recursive_multi(self): l = [] d = {1:l} i = C() i.attr = d l.append(i) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertIsInstance(x, list) self.assertEqual(len(x), 1) self.assertEqual(dir(x[0]), dir(i)) self.assertEqual(x[0].attr.keys(), [1]) self.assertTrue(x[0].attr[1] is x)
def test_newobj_generic(self): for proto in protocols: for C in myclasses: B = C.__base__ x = C(C.sample) x.foo = 42 s = self.dumps(x, proto) y = self.loads(s) detail = (proto, C, B, x, y, type(y)) self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail)
def test_attribute_name_interning(self): # Test that attribute names of pickled objects are interned when # unpickling. for proto in protocols: x = C() x.foo = 42 x.bar = "hello" s = self.dumps(x, proto) y = self.loads(s) x_keys = sorted(x.__dict__) y_keys = sorted(y.__dict__) for x_key, y_key in zip(x_keys, y_keys): self.assertIs(x_key, y_key)
def test_recursive_inst(self): i = C() i.attr = i for proto in protocols: s = self.dumps(i, proto) x = self.loads(s) self.assertEqual(dir(x), dir(i)) self.assertIs(x.attr, x)
def test_recursive_multi(self): l = [] d = {1:l} i = C() i.attr = d l.append(i) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertEqual(len(x), 1) self.assertEqual(dir(x[0]), dir(i)) self.assertEqual(x[0].attr.keys(), [1]) self.assertTrue(x[0].attr[1] is x)
def test_newobj_generic(self): for proto in protocols: for C in myclasses: B = C.__base__ x = C(C.sample) x.foo = 42 s = self.dumps(x, proto) y = self.loads(s) detail = (proto, C, B, x, y, type(y)) self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail) # Register a type with copy_reg, with extension code extcode. Pickle # an object of that type. Check that the resulting pickle uses opcode # (EXT[124]) under proto 2, and not in proto 1.
def test_recursive_multi(self): l = [] d = {1:l} i = C() i.attr = d l.append(i) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertIsInstance(x, list) self.assertEqual(len(x), 1) self.assertEqual(dir(x[0]), dir(i)) self.assertEqual(list(x[0].attr.keys()), [1]) self.assertTrue(x[0].attr[1] is x)
def test_newobj_generic(self): for proto in protocols: for C in myclasses: B = C.__base__ x = C(C.sample) x.foo = 42 s = self.dumps(x, proto) y = self.loads(s) detail = (proto, C, B, x, y, type(y)) self.assert_is_copy(x, y) # XXX revisit self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail)
def test_nested_names(self): global Nested class Nested: class A: class B: class C: pass for proto in range(4, pickle.HIGHEST_PROTOCOL + 1): for obj in [Nested.A, Nested.A.B, Nested.A.B.C]: with self.subTest(proto=proto, obj=obj): unpickled = self.loads(self.dumps(obj, proto)) self.assertIs(obj, unpickled)
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))
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 = (b"(i__main__\n" b"X\n" b"p0\n" b"(dp1\nb.").replace(b'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 = (b'(c__main__\n' b'X\n' b'q\x00oq\x01}q\x02b.').replace(b'X', xname) self.assert_is_copy(X(*args), self.loads(pickle1)) # Protocol 2 (pickle2 = b'\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 = (b'\x80\x02(c__main__\n' b'X\n' b'q\x00oq\x01}q\x02b.').replace(b'X', xname) self.assert_is_copy(X(*args), self.loads(pickle2))
