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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:

names = ['Jenny', 'Alexus', 'Sam', 'Grace']
heights = [61, 70, 67, 64]

Python allows you to create a dictionary using a dict comprehension, with this syntax:

students = {key:value for key, value in zip(names, heights)}
#students is now {'Jenny': 61, 'Alexus': 70, 'Sam': 67, 'Grace': 64}

Remember that zip() combines two lists into an iterator of tuples with the list elements paired together. This dict comprehension:

  1. Takes a pair from the iterator of tuples
  2. Names the elements in the pair key (the one originally from the names list) and value (the one originally from the heights list)
  3. Creates a key : value item in the students dictionary
  4. Repeats steps 1-3 for the entire iterator 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 an iterator of pairs between the drinks list and the caffeine list.

2.

Create a dictionary called drinks_to_caffeine by using a dict comprehension that goes through the zipped_drinks iterator and turns each tuple pair into a key:value item.

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