python学习16——列表。

states = {
 'Oregon': 'OR',
 'Florida': 'FL',
 'California': 'CA',
 'New york': 'NY',
 'Michigan': 'MI'
 }
cities = {
  'CA' : 'San francisco',
  'MI' : 'Detroit',
  'FL' : 'Jacksonville'
  }
cities['NY'] = 'New York'
cities['OR'] = 'Portland'

print("-" * 10)
print("NY State has:", cities['NY'])
print("OR Stare has:", cities["OR"])

print("-" * 10)
print("Michigan's abbreviation is :", states['Michigan'])
print("Florida's abbreviation is:", states['Florida'])

print("-" * 10)
print("Michigan has:", cities[states['Michigan']])
print("Florida has:", cities[states['Florida']])

print("-" * 10)
for state, abbreviation in states.items():
 print("%s is abbreviated %s" % (state, abbreviation))

print("-" * 10)
for abbreviation, city in cities.items():
 print("%s state is abbreviated %s and has city %s" % (state, abbreviation, cities[abbreviation]))

print("_" * 10)
state = states.get('Texas', None)

if not state:
 print("Sorry, no Texas.")
city = cities.get('TX', 'Does not exist')
print("The city for the state 'TX' is: %s" % city)

 输出结果：