{ word1: definition }

{ word1: definition,     word2: definition }

Writing a Dictionary

so many emails to remember ;(

#contacts
emails = {'mark': 'mark@banana.com', 
          'tom': 'cool@apple.com', 
          'brendan': 'coolest@papya.com', 
          'zev': 'zen@bahamas.com'}
                    

now your turn

Playing with Dictionaries

empty_dict = {}

len(empty_dict)                  
#show number of entries

empty_dict['mark'] 
#uh oh, nothing's there!

empty_dict.get('mark', 'cool')          
#get to the rescue!

#two dictionaries --> one!

empty_dict.update(existing_dict)

now your turn
(as a grocery store owner)

1. create inventory of fruit
   • 2 bananas, 1 apple, 5 oranges, 3 grapefruits
2. Tom buys 3 oranges
   • decrease the number of oranges to 2
3. Expand store to veggies
   • add three veggies of your choice

                names = ['mark', 'tom', 'zev', 'brendan']
                    

for name in names

Keeping track of your steps

enumerate #beauty of python vs. C

for i, name in enumerate( names ):
print( i, name )

Step, break and wiggle with it

names = ['mark', 'tom', 'zev', 'brendan']      

#print up to zev
for name in names:
    print name
    if name == "zev":
        break

#print all names except tom's
for name in names:
    if name == 'tom':
        continue
    else:
        print name

now your turn
(print names, skipping every other name)