笨办法学Python-习题40

习题40：

Python 字典(Dictionary)

字典是花括号｛｝

列表是[]

元组是（）

字典里左边的叫键 右边叫键值 值竟然可以放一个函数名~

cities={'CA':'San Francisco','MI':'Detroit','FL':'Jacksonville'}
cities['NY']='New York'
cities['OR']='Portland'

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

cities['_find']=find_city

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

for city in cities:
print city

print cities.items()