代码：

class Test( object ):
    ""
    def __new__( cls, x, **args ):
        return object.__new__( cls )

r0 = Test( 4 )
from copy import deepcopy
r = deepcopy( r0 )

报错：

    r = deepcopy( r0 )
  File "D:\Python25\lib\copy.py", line 189, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "D:\Python25\lib\copy.py", line 322, in _reconstruct
    y = callable(*args)
  File "D:\Python25\lib\copy_reg.py", line 92, in __newobj__
    return cls.__new__(cls, *args)
TypeError: __new__() takes exactly 2 arguments (1 given)

这是怎么回事？

经测试，__new__( cls, **args )　这样就可以。多一个参数就不行。

deepcopy复杂的对象的时候就容易报错，除了拷贝字典和序列，尽量不用

r0 = Test( 4 )
好像少给了个参数