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class MyClass():
def __init__(self, n = 10):
self._Field = n
def __getitem__(self, range):
return MyClass(self._Field)
obj1 = MyClass()
obj2 = obj1
obj3 = obj1[:]
obj1._Field = 100
obj4 = MyClass(123)
print obj1._Field, obj2._Field, obj3._Field, obj4._Field 
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>>> 100 100 10 123


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def
subString
(s,
length):
   
us = unicode(s, 'utf-8
')
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us.encode('gb2312
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    n = int(length)
   
t = gs[:n]
    while True
:
        try
:
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