我们从Python开源项目中，提取了以下10个代码示例，用于说明如何使用_pickle.Pickler()。
def test_pickler(self): basesize = support.calcobjsize('5P2n3i2n3iP') p = _pickle.Pickler(io.BytesIO()) self.assertEqual(object.__sizeof__(p), basesize) MT_size = struct.calcsize('3nP0n') ME_size = struct.calcsize('Pn0P') check = self.check_sizeof check(p, basesize + MT_size + 8 * ME_size + # Minimal memo table size. sys.getsizeof(b'x'*4096)) # Minimal write buffer size. for i in range(6): p.dump(chr(i)) check(p, basesize + MT_size + 32 * ME_size + # Size of memo table required to # save references to 6 objects. 0) # Write buffer is cleared after every dump().
def test_signature_on_builtin_class(self): self.assertEqual(str(inspect.signature(_pickle.Pickler)), '(file, protocol=None, fix_imports=True)') class P(_pickle.Pickler): pass class EmptyTrait: pass class P2(EmptyTrait, P): pass self.assertEqual(str(inspect.signature(P)), '(file, protocol=None, fix_imports=True)') self.assertEqual(str(inspect.signature(P2)), '(file, protocol=None, fix_imports=True)') class P3(P2): def __init__(self, spam): pass self.assertEqual(str(inspect.signature(P3)), '(spam)') class MetaP(type): def __call__(cls, foo, bar): pass class P4(P2, metaclass=MetaP): pass self.assertEqual(str(inspect.signature(P4)), '(foo, bar)')
def test_unbound_builtin_method(self): self.assertEqual(self._get_summary_line(_pickle.Pickler.dump), "dump(self, obj, /)") # these no longer include "self"
def test_bound_builtin_method(self): s = StringIO() p = _pickle.Pickler(s) self.assertEqual(self._get_summary_line(p.dump), "dump(obj, /) method of _pickle.Pickler instance") # this should *never* include self!
def test_getfullargspec_builtin_methods(self): self.assertFullArgSpecEquals(_pickle.Pickler.dump, args_e=['self', 'obj'], formatted='(self, obj)') self.assertFullArgSpecEquals(_pickle.Pickler(io.BytesIO()).dump, args_e=['self', 'obj'], formatted='(self, obj)') self.assertFullArgSpecEquals( os.stat, args_e=['path'], kwonlyargs_e=['dir_fd', 'follow_symlinks'], kwonlydefaults_e={'dir_fd': None, 'follow_symlinks': True}, formatted='(path, *, dir_fd=None, follow_symlinks=True)')
def serial(result, fname = "temp.bin"): if charade.detect(fname)['encoding'] == 'utf-8': fname = convert(fname) root_dir = os.path.dirname(__file__) fname = root_dir + "\\" +fname f = open(fname,"wb") p = cPickle.Pickler(f) p.clear_memo() p.fast = True p.dump(result) f.close()
