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Use __reduce_ex__ in copy.py. The test_*copy_cant() tests are simpler again.

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This commit is contained in:
Guido van Rossum 2003-02-19 01:19:28 +00:00
parent a43fd0c899
commit e690883ccf
3 changed files with 65 additions and 32 deletions
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54
Lib/copy.py
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@ -79,14 +79,20 @@ def copy(x):
return copier(x)
reductor = dispatch_table.get(cls)
if not reductor:
reductor = getattr(cls, "__reduce__", None)
if reductor == object.__reduce__:
reductor = _better_reduce
elif not reductor:
raise Error("un(shallow)copyable object of type %s" % cls)
if reductor:
rv = reductor(x)
else:
reductor = getattr(x, "__reduce_ex__", None)
if reductor:
rv = reductor(2)
else:
reductor = getattr(x, "__reduce__", None)
if reductor:
rv = reductor()
else:
raise Error("un(shallow)copyable object of type %s" % cls)
return _reconstruct(x, reductor(x), 0)
return _reconstruct(x, rv, 0)
_copy_dispatch = d = {}
@ -176,21 +182,27 @@ def deepcopy(x, memo=None, _nil=[]):
except TypeError: # cls is not a class (old Boost; see SF #502085)
issc = 0
if issc:
copier = _deepcopy_atomic
y = _deepcopy_atomic(x, memo)
else:
copier = getattr(cls, "__deepcopy__", None)
if copier:
y = copier(x, memo)
else:
reductor = dispatch_table.get(cls)
if not reductor:
reductor = getattr(cls, "__reduce__", None)
if reductor == object.__reduce__:
reductor = _better_reduce
elif not reductor:
raise Error("un(deep)copyable object of type %s" % cls)
y = _reconstruct(x, reductor(x), 1, memo)
copier = getattr(x, "__deepcopy__", None)
if copier:
y = copier(memo)
else:
reductor = dispatch_table.get(cls)
if reductor:
rv = reductor(x)
else:
reductor = getattr(x, "__reduce_ex__", None)
if reductor:
rv = reductor(2)
else:
reductor = getattr(x, "__reduce__", None)
if reductor:
rv = reductor()
else:
raise Error(
"un(deep)copyable object of type %s" % cls)
y = _reconstruct(x, rv, 1, memo)
memo[d] = y
_keep_alive(x, memo) # Make sure x lives at least as long as d