Learn Python the hard way, ex40 字典，可爱的字典

 #!/usr/bin/python
 #coding:utf-8
 cities ={'CA':'sf','MI':'dt','FL':'je'}  #创建字典
 cities['NY']='ny'    #增加新元素
 cities['OR']='pd'

 def find_city(themap,state):
     if state in themap:
         return themap[state]
     else:
         return 'not found'

 #ok pay attention
 cities['_find'] =find_city

 while True:
     print "State?(ENTER to quit)",
     state = raw_input('>>')
     if not state: break

     #this line is the most important ever!study!
     city_found = cities['_find'](cities,state)
     print city_found

Output

 State?(ENTER to quit) >>CA
 sf
 State?(ENTER to quit) >>FL
 je
 State?(ENTER to quit) >>0
 not found
 State?(ENTER to quit) >>VT
 not found
 State?(ENTER to quit) >>

Python 字典(Dictionary)