Erle Robotics Learning Python GitBook Free

For loop with dictionaries

The use of for when accessing dictionaries is very similar to using this loop with lists.The command should be something like this example:

for key in d:
    print d[key]

Note that dictionaries are unordered, meaning that any time you loop through a dictionary, you will go through every key, but you are not guaranteed to get them in any particular order.

Practice 1

We have the following dictionary:

webster = {
    "Aardvark" : "A star of a popular children's cartoon show.",
    "Baa" : "The sound a goat makes.",
    "Carpet": "Goes on the floor.",
    "Dab": "A small amount."
}

Use a for loop to print all the values:

>>> webster = {
...     "Aardvark" : "A star of a popular children's cartoon show.",
...     "Baa" : "The sound a goat makes.",
...     "Carpet": "Goes on the floor.",
...     "Dab": "A small amount."
... }
>>>
>>> for key in webster:
...     print webster[key]
...
A star of a popular children's cartoon show.
Goes on the floor.
A small amount.
The sound a goat makes.
>>>