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

beginning python summary chapter 4 ×Öµä

1¡¢PythonÖ®ÖÐΨһÄÚ½¨µÄÓ³ÉäÀàÐ;ÍÊÇ×ֵ䣨Dictionary£©¡£×ÖµäÖеÄÖµ²¢Ã»ÓÐÌØÊâµÄ˳Ðò£¬µ«ÊǶ¼°´Õչؼü×Ö£¨Key£©½øÐд洢£¬¹Ø¼ü×Ö¿ÉÒÔÊÇÊý×Ö¡¢×Ö·û´®£¬ÉõÖÁÊÇÔª×飨Tuple£©¡£
2¡¢×ÖµäµÄÓï·¨£º×ÖµäÃû = {'¼ükeys':'Öµvaules','¼ükeys':'Öµvaules','¼ükeys':'Öµvaules',...}£¬×ÖµäÖаüº¬ºÜ¶à¶Ô£¨³ÆÎªÌõÄ¿items£©£¬ÓÉ£¨keys£©ºÍËüÃÇÏà¶ÔÓ¦µÄÖµ£¨Values£©×é³É£¬Ã¿¸ö¼üºÍÖµÖ®¼äÓÃðºÅ£¨:£©¸ô¿ª£¬ÌõĿ֮¼äÒÔ¶ººÅ£¨,£©Ïà¸ô£¬¶øÕû¸ö×ÖµäÊÇÓÉÒ»¶Ô»¨À¨ºÅÀ¨Æð£¬¿Õ×ֵ䣨ûÓÐÈκÎÏîÄ¿£©ÓÉÁ½¸ö»¨À¨ºÅ×é³É£¬ÏñÕâÑù£º{}¡£
     note:×ÖµäÖеļüÊÇΨһµÄ£¨ÆäËûÀàÐ͵ÄÓ³ÉäÒ²ÊÇÈç´Ë£©£¬¶øÖµÔò²»È»¡£
3¡¢×ֵ亯Êý£ºÄã¿ÉÒÔÓÃ×ֵ亯Êý´ÓÆäËûÓ³É䣨±ÈÈçÆäËû×ֵ䣩»òÕߣ¨¼ü£¬Öµ£©µÄÐòÁн¨Á¢×ֵ䡣eg:>>> items = [('name', 'Gumby'), age', 42)]   >>> d = dict(items)   >>> d   {'age': 42, 'name': 'Gumby'}    >>> d['name']   'Gumby'
     Ëü¿ÉÒÔ´øÓйؼü´Ê²ÎÊýʹÓã¬ÈçÏ£º
      >>> d = dict(name='Gumby', age=42)
      >>> d
      {'age': 42, 'name': 'Gumby'}
4¡¢»ù±¾×Öµä²Ù×÷£ºlen(d)·µ»ØdÖÐÌõÄ¿£¨¼ü-Öµ£©µÄÊýÁ¿£¬ d[k]·µ»Ø¹ØÁªµ½¼ükÉϵÄÖµ£¬d[k]=v½«Öµv¹ØÁªµ½¹Ø¼ü×ÖkÉÏ£¬del d[k]ɾ³ýÓµÓмükµÄÌõÄ¿£¬k in d¼ì²édÖÐÊÇ·ñº¬Óмük¡£eg:>>>len(d) 2  >>>d['age']  42   >>>d['age'] = 21  >>>'age' in d    true  >>>del d['age'].
     ×ÖµäµÄ¼ü²»Ò»¶¨ÎªÕûÊý,¿ÉΪÈκÎÀàÐÍ£¬±ÈÈç×Ö·û´®»òÔª×飬¸¡µãÊý¡£
     Äã¿ÉÒÔ¹ØÁªÒ»¸öÖµµ½Ò»¸ö¼üÉÏÃæ£¬¾ÍËãÄǸö¼ü²»´æÔÚÓÚ×ÖµäÖУ¬ÕâÖÖÇé¿öÏÂеÄÌõÄ¿»á½¨Á¢¡£Äã²»Äܽ«Öµ¹ØÁªµ½ÁÐ±í·¶Î§ÄÚ²»´æÔÚµÄË÷Òý£¨index£©ÉÏ¡£
     ±í´ïʽk in d£¨dΪ×ֵ䣩ÓÃÀ´²éÕÒ¼ü£¬¶ø²»ÊÇÖµ¡£±í´ïʽv in l£¨lΪÁÐ±í£©ÔòÓÃÀ´²éÕÒÖµ£¬¶ø²»ÊÇË÷Òý¡£
5¡¢ÓÃ×Öµä¸ñʽ»¯×Ö·û£ºÔÚÿ¸öת»»ËµÃ÷£¨conversion specifier£©ÖеÄ%×ÖĸºóÃæ£¬Äã¿ÉÒÔ¼ÓÉϼü£¨ÓÃÔ²À¨ºÅÀ¨×¡£©£¬ºóÃæ¸úÉÏÆäËû˵Ã÷ÔªËØ¡£eg:>>>"gumby's age is %(age)s." %


Ïà¹ØÎĵµ£º

Pythonѧϰ±Ê¼Ç Îļþ¶Áд

PythonÖÐÎļþ²Ù×÷¿ÉÒÔͨ¹ýopenº¯Êý£¬ÕâµÄÈ·ºÜÏñCÓïÑÔÖеÄfopen¡£Í¨¹ýopenº¯Êý»ñȡһ¸öfile object£¬È»ºóµ÷ÓÃread()£¬write()µÈ·½·¨¶ÔÎļþ½øÐжÁд²Ù×÷¡£
1.open
ʹÓÃopen´ò¿ªÎļþºóÒ»¶¨Òª¼ÇµÃµ÷ÓÃÎļþ¶ÔÏóµÄclose()·½·¨¡£±ÈÈç¿ÉÒÔÓÃtry/finallyÓï¾äÀ´È·±£×îºóÄܹرÕÎļþ¡£
file_object = open('thefile.txt') ......

Python Á·Ï°2

Éú³ÉÒ»¸öÓÐN¸öÔªËØµÄÓÐËæ»úÕûÊýn×é³ÉµÄÁÐ±í£¬ÆäÖÐNºÍÄêµÄȡֵ·¶Î§ÊÇ£¨1<N<=5£©
ºÍ(0<=n<100)£¬ÏÔʾÕâ¸öÁбíµÄËùÓÐ×Ó¼¯¡£
N¸öÊý×Ö¿ÕÓÐ2en¸ö×Ó¼¯£¬¶ÔÓÚÕâN¸öÊý×ÖÔÚÿ¸ö×Ó¼¯ÖÐÀ´½²ÒªÃ´´æÔÚҪô²»´æÔÚ£¬¿ÉÒÔ²ÉÓÃ×Ó¼¯Ó³ÉäΪ2½øÖƵÄËã·¨¡£
ÀýÈç[a,b]¼¯ºÏµÄ×Ó¼¯£º
¿Õ      ---- &nb ......

pythonϵÄweb¿ª·¢¿ò¼Ü Django,urlÅäÖÃ

urlÅäÖÃ
ÎÒÃÇÔÚpollsÕâ¸öappÏ´´½¨Ò»¸ö
helloworld.py
from django.http import HttpResponse
def index(request):
    return HttpResponse("Hello, Django.")
ÐÞ¸Ä urls.py
from django.conf.urls.defaults import *
# Uncomment the next two lines to enable the admin:
# from django.contrib ......

pythonµÄ±Õ°ü(3.0֮ǰ¼°Ö®ºó)

Ê×ÏÈ, ˵˵pythonÀïÃæµÄ±Õ°ü°É:
1. ÐèÒªº¯ÊýǶÌ×, ¾ÍÊÇÒ»¸öº¯ÊýÀïÃæÔÙдһ¸öº¯Êý.
2. Íⲿº¯ÊýÐèÒª·µ»ØÒ»¸öÄÚ²¿º¯ÊýµÄÒýÓÃ
3. Íⲿº¯ÊýÖÐÓÐһЩ¾Ö²¿±äÁ¿, ²¢ÇÒ, ÕâЩ¾Ö²¿±äÁ¿ÔÚÄÚ²¿º¯ÊýÖÐÓÐʹÓÃ
¸ÅÄî:
1. ×ÔÓɱäÁ¿: Íⲿº¯ÊýÖж¨ÒåµÄ¾Ö²¿±äÁ¿, ²¢ÇÒÔÚÄÚ²¿º¯ÊýÖб»Ê¹ÓÃ.
2. ±Õ°ü: ÄǸöʹÓÃÁË×ÔÓɱäÁ¿²¢±»·µ»ØµÄÄÚ²¿º¯Ê ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ