Python Training Day 7. Dictionaries

Chapter 10. Dictionaries (learnpython.org)

 

1. How to define a dictionary

phonebook = {}
phonebook["John"] = 938477566
phonebook["Jack"] = 938377264
phonebook["Jill"] = 947662781

phonebook = {
    "John" : 938477566,
    "Jack" : 938377264,
    "Jill" : 947662781
}

 

2. Iterating over dictionaries

phonebook = {"John" : 938477566,"Jack" : 938377264,"Jill" : 947662781}
for name, number in phonebook.items():
    print("Phone number of %s is %d" % (name, number))
    
# print
'''
Phone number of Jill is 947662781
Phone number of John is 938477566
Phone number of Jack is 938377264
'''

 

3. Removing a value

del phonebook["John"]
phonebook.pop("John")

 

Exercise