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authorGuido van Rossum <guido@python.org>2003-01-28 17:55:05 (GMT)
committerGuido van Rossum <guido@python.org>2003-01-28 17:55:05 (GMT)
commit533dbcf250bf4e2310ab72d8d42f2efe3be6febf (patch)
tree49c338482d819fdd1f4027ef590529986b2070f9 /Lib
parent53b39d2e70768e34c3f01f0d6efbe76c9913d422 (diff)
downloadcpython-533dbcf250bf4e2310ab72d8d42f2efe3be6febf.zip
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Some experimental support for generating NEWOBJ with proto=2, and
fixed a bug in load_newobj().
Diffstat (limited to 'Lib')
-rw-r--r--Lib/pickle.py33
-rw-r--r--Lib/test/pickletester.py39
2 files changed, 70 insertions, 2 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py
index 1b364c6..e433616 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -77,11 +77,13 @@ class _Stop(Exception):
def __init__(self, value):
self.value = value
+# Jython has PyStringMap; it's a dict subclass with string keys
try:
from org.python.core import PyStringMap
except ImportError:
PyStringMap = None
+# UnicodeType may or may not be exported (normally imported from types)
try:
UnicodeType
except NameError:
@@ -249,7 +251,10 @@ class Pickler:
return GET + `i` + '\n'
- def save(self, obj):
+ def save(self, obj,
+ _builtin_type = (int, long, float, complex, str, unicode,
+ tuple, list, dict),
+ ):
# Check for persistent id (defined by a subclass)
pid = self.persistent_id(obj)
if pid:
@@ -278,6 +283,30 @@ class Pickler:
self.save_global(obj)
return
+ # Check for instance of subclass of common built-in types
+ # XXX This block is experimental code that will go away!
+ if self.proto >= 2:
+ if isinstance(obj, _builtin_type):
+ assert t not in _builtin_type # Proper subclass
+ args = ()
+ getnewargs = getattr(obj, "__getnewargs__", None)
+ if getnewargs:
+ args = getnewargs() # This better not reference obj
+ self.save_global(t)
+ self.save(args)
+ self.write(NEWOBJ)
+ self.memoize(obj)
+ getstate = getattr(obj, "__getstate__", None)
+ if getstate:
+ state = getstate()
+ else:
+ state = getattr(obj, "__dict__", None)
+ # XXX What about __slots__?
+ if state is not None:
+ self.save(state)
+ self.write(BUILD)
+ return
+
# Check copy_reg.dispatch_table
reduce = dispatch_table.get(t)
if reduce:
@@ -970,7 +999,7 @@ class Unpickler:
args = self.stack.pop()
cls = self.stack[-1]
obj = cls.__new__(cls, *args)
- self.stack[-1:] = obj
+ self.stack[-1] = obj
dispatch[NEWOBJ] = load_newobj
def load_global(self):
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 3d65383..ea658bb 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -300,6 +300,45 @@ class AbstractPickleTests(unittest.TestCase):
y = self.loads(s)
self.assert_(x is y, (proto, x, s, y))
+ def test_newobj_tuple(self):
+ x = MyTuple([1, 2, 3], foo=42, bar="hello")
+ s = self.dumps(x, 2)
+ y = self.loads(s)
+ self.assertEqual(tuple(x), tuple(y))
+ self.assertEqual(x.__dict__, y.__dict__)
+
+ def test_newobj_list(self):
+ x = MyList([1, 2, 3], foo=42, bar="hello")
+ s = self.dumps(x, 2)
+ y = self.loads(s)
+ self.assertEqual(list(x), list(y))
+ self.assertEqual(x.__dict__, y.__dict__)
+
+class MyTuple(tuple):
+ def __new__(cls, *args, **kwds):
+ # Ignore **kwds
+ return tuple.__new__(cls, *args)
+ def __getnewargs__(self):
+ return (tuple(self),)
+ def __init__(self, *args, **kwds):
+ for k, v in kwds.items():
+ setattr(self, k, v)
+
+class MyList(list):
+ def __new__(cls, *args, **kwds):
+ # Ignore **kwds
+ return list.__new__(cls, *args)
+ def __init__(self, *args, **kwds):
+ for k, v in kwds.items():
+ setattr(self, k, v)
+ def __getstate__(self):
+ return list(self), self.__dict__
+ def __setstate__(self, arg):
+ lst, dct = arg
+ for x in lst:
+ self.append(x)
+ self.__init__(**dct)
+
class AbstractPickleModuleTests(unittest.TestCase):
def test_dump_closed_file(self):