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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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f =
file('x1.txt', 'w')
f.write(u'ÖÐÎÄ')
f.colse()
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½Ó½á¹ûÓ¦¸ÃÊÇÀàËÆ
    f.write(u'ÖÐÎÄ')
UnicodeEncodeError: 'ascii'
codec can't encode characters in position 0-16: ordinal not in
range(128)
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import codecs
f = codecs. ......

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        Ô­ÓбàÂë -> ÄÚ²¿±àÂë ->
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1.c ±àдfor Ñ­»·£¬¶ÔÓÚ×Ö·û´®S£¬·µ»ØÒ»¸öеÄÁÐ±í£¬ÆäÖаüº¬ÁË×Ö·û´®Ã¿¸ö×Ö·ûµÄASCIIÂë¡£
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for i in S:
    L = [ord(i) for i in S] #Áбí½âÎöµÄ˼·
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for i in S:
    L = L.append(ord(i))
Ìáʾ¿Õ¶ ......

Python °ËÈٰ˳Ü

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Recipe 2.5. Counting Lines in a File
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