Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

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

PythonÖеÄUnicodeÔÚDelphiÈçºÎ»¹Ô­³ÉGb2312£¿

ÒÑÖªPython ÖУº
s = unicode("²âÊÔ", "gb2312")
s = u'\u6d4b\u8bd5'
print s
²âÊÔ

ÔÚDelphiÀïÃæÈçºÎ½«\u6d4b\u8bd5ÕâÑùµÄ»¹Ô­³ÉGb2312µÄºº×ÖÄØ£¿
ÕÒµ½¸ö·½·¨
......

Ë­ÍÆ¼öÒ»±¾Ñ§Ï°PYTHONµÄÊ飬лл

Ë­ÍÆ¼öÒ»±¾Ñ§Ï°PYTHONµÄÊ飬лл
¡¶python¼òÃ÷½Ì³Ì¡·£¬¡¶pythonºËÐıà³Ì¡·

×÷Ϊϵͳ¹ÜÀí·½Ãæ£¬¡¶Python UNIXºÍLinuxϵͳ¹ÜÀíÖ¸ÄÏ¡·ÊDZ¾·Ç³£²»´íµÄÊé¡£
http://club.book.csdn.net/pic3/255142.jpg

ÒýÓÃ
×÷Î ......

pythonÖÐ×Ö·û´®±È½ÏµÄÎÊÌâµÄÎÊÌâ

ÒÔÏ´úÂëÊÇTk×öÁËÒ»¸ö¼òµ¥µÄÃÜÂëÑéÖ¤¹¦ÄÜ£¬ÊäÈëÒ»¸ö×Ö·û´®£¬²¢ÑéÖ¤ÆäÊÇ·ñÕýÈ·£¬ÇëÏÈ¿´´úÂ룺
Python code:

from tkinter import *
root = Tk()
e = StringVar()
t = 'cashlu'
def yanzheng():
if e ......

python½âÎöxmlÎļþ

ʹÓÃxml.dom½âÎö¼¸Õ×µÄxmlÎļþ£¬·Ç³£»ºÂý£¬ÓÐÖÖ¼ÙËÀµÄ¸Ð¾õ¡£Ôõô½â¾ö£¿ÓÃÆäËû¿âÊÇ·ñ»áºÃЩ£¬ÔÝʱֻ֪µÀÕâ¸ö¿âµÄ¡£
Äã¿ÉÒÔÊÔÒ»ÏÂElementTree


pythonµÄ¹Ù·½Àý×Ó
import xml.parsers.expat

# 3 handler ......

python winϵ÷ÓÃdll

  СµÜ½Ó´¥python 2¸öÐÇÆÚÁË£¬°²×°µÄÊÇpython3.1°æ¡£
ÎÒÓõÄÊÇwindows7£¬Ïëд¸öµ÷ÓÃdllµÄ³ÌÐòʵ¼ù¡£ÎÊÌâÀ´ÁË£º

C++´úÂ룺
extern "C" int __stdcall test();

int __stdcall te ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ