笨办法学Python（learn python the hard way）--练习程序39-40

下面是练习39-练习40，基于python3

 #ex39.py
 1 ten_things = "Apples Oranges Crows Telephone Light Sugar"

 print("Wait there's not 10 things in that list,let's fix that.")

 stuff = ten_things.split(' ')

 more_stuff = ["Day", "Night", "Song", "Frisbee", "Corn", "Banana", "Girl", "Boy"]

 while len(stuff) != 10:
     next_one = more_stuff.pop()
     print("Adding: ", next_one)
     stuff.append(next_one)
     print("There's %d items now." % len(stuff))

 print("There we go: ", stuff)

 print("Let's do some things with stuff.")

 print(stuff[1])
 print(stuff[-1]) # whoa! fancy
 print(stuff.pop())
 print(' '.join(stuff)) # what? cool!
 print('#'.join(stuff[3:5])) # super stellar!

 #ex40.py
 1 # list

 things = ['a', 'b', 'c', 'd']
 print(things[1])

 things[1] = 'z'
 print(things[1])

 print(things)

 # dict

 stuff = {'name': 'Zed', 'age': 36, 'height': 6*12+2}
 print(stuff['name'])
 print(stuff['age'])
 print(stuff['height'])

 stuff['city'] = "San Francisco"
 print(stuff['city'])

 stuff[1] = "Wow"
 stuff[2] = "Neato"
 print(stuff[1])
 print(stuff[2])
 print(stuff)

 del stuff['city']
 del stuff[1]
 del stuff[2]
 print(stuff)

 #ex40+.py
 1 # 练习

 cities = {'CA': 'San Francisco', 'MI': 'Detroit', 'FL': 'Jacksonville'}

 cities['NY'] = 'New York'
 cities['OR'] = 'Portland'

 print(cities)
 print(cities.values())
 print(cities.keys())
 print(cities.items())

 def find_city(themap, state):
     if state in themap:
         return themap[state]
     else:
         return "Not found."

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

 j = cities.keys()
 for i in j:
     city_found = cities[i]
     print(city_found)

 while True:
     print("State?(ENTER to quit)",end = '')
     state = input("> ")

     if not state: break

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