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long(x [,base ])         ½«xת»»ÎªÒ»¸ö³¤ÕûÊý  
float(x )                ½«xת»»µ½Ò»¸ö¸¡µãÊý  
complex(real [,imag ])   ´´½¨Ò»¸ö¸´Êý  
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python socket server ²¢·¢£¨×ª£©

import SocketServer, time, select, sys
from threading import Thread
COMMAND_HELLO = 1
COMMAND_QUIT = 2
# The SimpleRequestHandler class uses this to parse command lines.
class SimpleCommandProcessor:
    def __init__(self):
        pass
  ......

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