ÇóÖúpython£¬map filter
map£¬filter·½·¨Ó¦¸Ã»á·µ»ØÒ»¸öÁÐ±í¡£
µ«ÊÇÔÚÎÒÕâÀËüÃÇ×ÜÊÇ·µ»Ø£º
<map object at 0x0000000002A2C978>
<filter object at 0x0000000002A2C9E8>
ÎÒÓõÄpython3.1£¬ Õâ¸öÒ²Êǰ汾µÄ±ä¶¯µ¼ÖµÄÂð£¿
def map_func(lis):
return lis + 1
li = [1,2,3,4,5]
map_l = map(map_func, li) #½«liÖÐËùÓеÄÊý¶¼+1
print (map_l)
¾ÍÊÇÕâ¸öС³ÌÐò£¬Ôõô¼Óprint£¿
¿´¿´Õâ¸ö
What's New In Python 3.0 http://blog.csdn.net/t_huanghai/archive/2008/12/04/3443782.aspx
ÀïÃæÓжÔpython3.0 map£¨£©º¯Êý½éÉÜ£¬²Î¿¼Ï £¬ÊÔÊÔ print list(map_l)
map() and filter() return iterators. If you really need a list, a quick fix is e.g. list(map(...)), but a better fix is often to use a list comprehension (especially when the original code uses lambda), or rewriting the code so it doesn¡¯t need a list at all. Particularly tricky is map() invoked for the side effects of the function; the correct transformation is to use a regular for loop (since creating a list would just be wasteful).
What's New In Python 3.0
invalid syntax
¿´À´£¬Ó¦¸ÃÕÕËü˵µÄ£¬ ÓÃfor loop
ллС¿µ
print (list£¨map_l£©)
correct format. mark it.
Ïà¹ØÎÊ´ð£º
ÎÒÿ´ÎÉÏ´«µÄÎļþ¶Áµ½µÄÊý¾Ý¶¼²»ÕýÈ·¡£2M µÄͼƬ¶ÁµÃ10¶àK ¡£¡£ÄÄλ´óÏÀ¿ÉÒÔ°ï°ïÎÒ°¡¡£
#!D:\ProgrammerTools\python26\python.exe
#encoding=utf-8
import cgitb
import os
cgitb.enable()
import cgi,urllib ......
ÓźñµÄ¸å³ê£¬³ÏÕÐPython¼¼ÊõÈËÔ±²ÎÓë¸÷ÖÖ¼¼ÊõÊé¼®³ö°æ¡£
ͨ¹ý¸ÃÊé¼®£¬×÷Õß¿ÉÒԵõ½Èçϱ¨³ê£º
1¡¢·áºñµÄ¸å³ê¡£
2¡¢Êé¼®Öø×÷µÄÊðÃûȨ¡£
3¡¢¶Ô×÷ÕߺÍÊé½øÐÐÐû´«£¬Ìá¸ß×÷ÕßÔÚ¼¼ÊõȦ×ÓÀ ......
ÔÚÎı¾ÎļþÖÐÆ¥ÅäÏî°üº¬ÖÐÎÄ
ÈçÄÚÈÝΪ£ºgamename=ÖÐÎÄ
key=ÌìÏÂ
Îı¾ÎļþµÄ±àÂëµÄÎļþΪutf-8
python´úÂëÈçÏ£º
# -*- coding:UTF-8 -*-
contents=open(from_pa ......
pythonµÄPIL¿â×Ô´øµÄ·½·¨Ö»ÄܽøÐоØÐεÄÇиÈç¹ûÎÒÓÐÁËÒ»¸ö¶à±ßÐθ÷¸ö¶¥µãµÄ×ø±ê£¬ÈçºÎ¶ÔÏÖÓеÄͼƬ°´ÕÕÕâ¸ö¶à±ßÐνøÐÐÇиîÄØ£¿
²»Ò»¶¨ÒªÓÃPIL¿â£¬ÈκÎÄÜʵÏÖÕâ¸ö¹¦Äܵķ½·¨¶¼ÐС£
ͼƬÇиîµÄjs²»ÊǺܶàÂð£¿
......