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        Ê×ÏÈ£¬½éÉÜif-elseÌõ¼þÓï¾ä¡£ifÓï¾äÊÇÓÃÀ´¸ù¾Ý±í´ïʽµÄÕæ¼ÙÀ´ÓÐÑ¡ÔñµÄÖ´ÐÐÌØ¶¨µÄ³ÌÐò¿é£¬¿ØÖƳÌÐòµÄÁ÷³Ì¡£Ó÷¨Í¬javaµÈÓïÑÔ¡£¶ÔÓÚelse if£¬ÓÐÒ»¸öelifµÄ¼òд·½Ê½¡£
        ÀýÈ磺
        if x > 3:
print("greater")
elif x == 3:
print("eq")
else:
print("small")   
        ½ÓÏÂÀ´½éÉÜwhileÓï¾ä¡£whileÓï¾äµÄ×÷ÓÃÊÇÔÚÌõ¼þ±í´ïÊ½ÎªÕæÊ±£¬Öظ´Ö´ÐÐÌØ¶¨µÄ³ÌÐò¿é¡£
        Ê×ÏÈ¿´Ò»¶ÎʾÀý³ÌÐò£¬È»ºóÔÚ¸øÓè˵Ã÷£º
        x = int(input("enter a integer:"))
while x != -1:
print(x)
x = int(input("next number:"))
else:
print("end")
print('over')
        ÔÚÕâ¶Î´úÂëÖУ¬Ö»ÒªxµÄÖµ²»µÈÓÚ-1£¬¾Í»áÖØ¸´µÄÖ´ÐС£Ïà¶ÔÓÚc/c++/javaÀ´½²£¬±È½ÏÌØÊâµÄÊÇÄǸöelseÓï¾ä¡£ÔÚÕâÀelseÊÇÒ»¸ö¿ÉÑ¡µÄÓï¾ä¡£µ±Ìõ¼þ±í´ïʽΪ¼Ù£¬Ìø³öwhileÑ­»·ºó£¬»áÖ´ÐÐelseÓï¾äϵijÌÐò¿é¡£
        ×îºó£¬¿´Ò»ÏÂforÑ­»·¡£for..inÊÇPythonÖеÄÁíÍâÒ»ÖÖÑ­»·Óï¾ä¡£Ö÷ҪĿµÄÊÇΪÁ˵ü´ú·ÃÎʶÔÏóÐòÁС£Ê¹Ó÷½·¨ÈçÏ£º
        for x in range(1,5):
print(x)
print('over')
        ¶ÔÓÚÑ­»·Óï¾ä£¬ÐèÒªÓÐÌø³öµ±Ç°Ñ­»·ºÍÌø³öÑ­»·µÄ·½·¨£¬ÔÚPythonÖУ¬Ê¹ÓÃcontinueºÍbreakÓï¾ä¡£¶ÔÓÚÕâÁ½¸öÓï·¨µÄʹÓã¬Í¬c/c++/java£¬ËùÒԾͲ»¶à¸´ÊöÁË¡£
        ʹÓÃÉÏÊöÕâÈýÖÖ·½·¨£¬¾Í¿ÉÒÔÍê³ÉPythonÖеÄËùÓеÄÁ÷³Ì¿ØÖƹ¤×÷ÁË£¡


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>>> f = open(”d:test.txt”, “w”)
˵Ã÷£ºµÚÒ»¸ö²ÎÊýÊÇÎļþÃû³Æ£¬°üÀ¨Â·¾¶£»µÚ¶þ¸ö²ÎÊýÊÇ´ò¿ªµÄģʽmode’r'£ºÖ»¶Á£¨È±Ê¡¡£Èç¹ûÎļþ²»´æÔÚ£¬ÔòÅ׳ö´íÎ󣩒w'£ºÖ»Ð´£¨Èç¹ûÎļþ ²»´æÔÚ£¬Ôò×Ô¶¯´´½¨Îļþ£©’a'£º¸½¼ ......

python udp c/s ¼Ç¼

server:
import sys
import socket
host = sys.argv[1]
port = int(sys.argv[2])
 
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 
s.bind((host,port))
 
while 1:
    try:
   &n ......

python hidden features

from http://stackoverflow.com/questions/101268/hidden-features-of-python
http://www.okpython.com/bbs/thread-3434-1-1.html
http://www.okpython.com/bbs/thread-3436-1-2.html
http://www.okpython.com/bbs/thread-3437-1-2.html
http://www.okpython.com/bbs/thread-3438-1-1.html
http://www.okpython.com/bb ......

python Ä£¿éµÄ__name__ __main__

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#!/usr/bin/pytho ......

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