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 from: http://www.cnblogs.com/dahuzizyd/archive/2005/03/01/111006.html
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class SuperClass:
    def sample(self):
        print 'SuperClass'
class SubClass(SuperClass):
    pass
sub = SubClass()
sub.sample()
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>>> ================================ RESTART ================================
>>>
SuperClass
>>>
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class SuperClass:
    def sample(self):
        print 'SuperClass'
class SuperClass1:
    def sample(self):
        print 'SuperClass1'
class SubClass(SuperClass,SuperClass1):
    pass
sub = SubClass()
sub.sample()
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ÏÖÔÚÖªµÀÏÂÃæҪ˵ʲôÁË°É£¬°ÑSubClassÀàµÄÉùÃ÷¸Ä³É:
class SubClass(SuperClass1,SuperClass):
    pass
ÔËÐУ¬¿´µ½µÄ½á¹ûÊÇSuperClass1µÄsample·½·¨±»µ÷Óá£
>>> ================================ RESTART ================================
>>>
SuperClass1
>>>
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import serial
ser = serial.Serial('com3',baudrate=115200, bytesize=8,parity='N', stopbits=1,xonxoff=0, timeout=1)
while( True ):
    a = ser.read(100)
    print a
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