ex39.py

# dictionaries

things = ['a', 'b', 'c', 'd']
print(things)
print(things[1])
things[3] = 'J'

stuff = {'name': 'Zed', 'age': 39, 'height': 6 * 12 + 2}
print(stuff)
print(stuff['name'])
print(stuff['age'])
stuff['city'] = "San Kanpur"
print(stuff['city'])
stuff[1] = "Wow"
stuff[2] = "Nato"

print(stuff[2])
print(stuff)

del stuff['city']
print(stuff)

# need to know how things are stored inside
# a list when not using number
# as an index

states = {
    'Oregon': 'OR',
    'Florida': 'FL',
    'California': 'CA',
    'New York': 'NY',
    'Michigan': 'MI'
}

# create a basic set of states and some cities in them
cities = {'CA': 'San Francisco', 'MI': 'Detroit', 'FL': 'Jacksonville', 'NY': 'New York', 'OR': 'Portland'}

# add some more cities

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

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

# do it by using the state then cities dict
print('-' * 10)
print("Michigan has: ", cities[states['Michigan']])
print("Florida has: ", cities[states['Florida']])

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

# print every city in state
print('-' * 10)
for abbrev, city in cities.items():
    print("%s has the city %s" % (abbrev, city))

# now do both at the same time
print('-' * 10)
for state, abbrev in states.items():
    print("%s state is abbreviated %s and has city %s" % (
        state, abbrev, cities[abbrev]))

print('-' * 10)
# safely get a abbreviation by state that might not be there
state = states.get('Texas')

if not state:
    print("Sorry, no Texas.")

# get a city with a default value
city = cities.get('TX', 'Does Not Exist')
print("The city for the state 'TX' is: %s" % city)