Creating and looping through dictionaries

You'll often encounter the need to loop over some array type data, like in Chapter 1, and provide it some structure so you can find the data you desire quickly.

You start that by creating an empty dictionary and assigning part of your array data as the key and the rest as the value.

Previously, you used sorted() to organize your data in a list. Dictionaries can also be sorted. By default, using sorted() on a dictionary will sort by the keys of the dictionary.

The goal of this exercise is to get familiar with building dictionaries via looping over some data source, and then looping over the dictionary to use that data.

This exercise is part of the course

Data Types in Python

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Exercise instructions

Create an empty dictionary called squirrels_by_park.
Loop over squirrels, unpacking it into the variables park and squirrel_details.
Inside the loop, add each squirrel_details to the squirrels_by_park dictionary using the park as the key.
Sort the squirrel_details dictionary keys in ascending order, print each park and its value using an F string..

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Create an empty dictionary: squirrels_by_park
____ = ____

# Loop over the squirrels list and unpack each tuple
for ____, ____ in ____:
    # Add each squirrel_details to the squirrels_by_park dictionary 
    ____[____] = ____
    
# Sort the squirrels_by_park dict alphabetically by park
for park in ____(squirrels_by_park):
    # Print each park and its value in squirrels_by_park
    print(f'{____}: {____[____]}')

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