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
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 ......
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 ......
C#ÀïÃæÓÃusing System.Security.Cryptography; RSACryptoServiceProvider¼ÓÃܹýµÄÏûÏ¢
ÓÃPython CryptoÖÐRSAµÄ·½·¨ ÄÜÖ±½Ó ½âÂð£¿
RSA¼ÓÃÜ·½Ê½²»ÊÇͳһµÄÂð£¿ÐèҪעÒâЩʲô£¿
ÓаïÖú¡£µ«ÊÇû½â¾öÎÊÌâ¡£¡£¡£
......
Python code:
class Rectangle:
def __init__(self, width, height):
self.width = width
self.height = height
def paint(self, factory):
point = factory.getPoint()
......
ÈçºÎ½«PythonдµÄÒ»¶Î´úÂëÉú³ÉpydÐÎʽµÄ¿â?
ÎÒÖªµÀµÄ·½·¨ÓУº½«Õâ¶ÎPython´úÂëÀ©Õ¹³ÉC´úÂ룬Ȼºóͨ¹ýVC½«Õâ¶ÎC´úÂëÉú³Éºó׺Ϊ.pydµÄ¶¯Ì¬Á´½Ó¿â¡£
²»ÏëÓÃÕâô±¿µÄ·½·¨£¬ÇëÎÊÓÐûÓбȽϼòµ¥µÄ·½·¨£¿Ð»Ð»£¡
¶¥Ò»Ï£¬ ......