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Creating Dictionaries
List Comprehensions to Dictionaries
Let’s say we have two lists that we want to combine into a dictionary, like a list of students and a list of their heights, in inches:
Python allows you to create a dictionary using a list comprehension, with this syntax:
Remember that zip() combines two lists into a zipped list of pairs. This list comprehension:
- Takes a pair from the zipped list of pairs from
namesandheights - Names the elements in the pair
key(the one originally from thenameslist) andvalue(the one originally from theheightslist) - Creates a
key:valueitem in thestudentsdictionary - Repeats steps 1-3 for the entire list of pairs
Instructions
1.
You have two lists, representing some drinks sold at a coffee shop and the milligrams of caffeine in each. First, create a variable called zipped_drinks that is a zipped list of pairs between the drinks list and the caffeine list.
2.
Create a dictionary called drinks_to_caffeine by using a list comprehension that goes through the zipped_drinks list and turns each pair into a key:value item.