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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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def foo():
print('function')
foo()
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http://hi.baidu.com/guzhilei1986/blog/item/8969b4debe99e150ccbf1ae7.html
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