Enumerate clarification

Question

This is the code that I was given:

cast = ["Barney Stinson", "Robin Scherbatsky", "Ted Mosby", "Lily Aldrin", "Marshall Eriksen"]
heights = [72, 68, 72, 66, 76]

print(cast)

This is the desired output:

['Barney Stinson 72', 'Robin Scherbatsky 68', 'Ted Mosby 72', 'Lily Aldrin 66', 'Marshall Eriksen 76']

This is the solution:

cast = ["Barney Stinson", "Robin Scherbatsky", "Ted Mosby", "Lily Aldrin", "Marshall Eriksen"]
heights = [72, 68, 72, 66, 76]

for i, character in enumerate(cast):
    cast[i] = character + " " + str(heights[i])

print(cast)

This is the question for this piece of code:

for i, character in enumerate(cast):
    cast[i] = character + " " + str(heights[i])

Why are the putting cast[i] and heights[i] and not only cast/heights? If it is a enumerate function is it supposed to number all names?

example:

letters = ['a', 'b', 'c', 'd', 'e']
for i, letter in enumerate(letters):
    print(i, letter)

This code would output:

0 a
1 b
2 c
3 d
4 e

Answer 1

You're modifying the characters of cast while you're iterating over it while also taking the position of the same character in the heights list.

You cannot use height because that's not a valid variable name in that loop and heights is the entire list; go ahead and try using it, it won't give you the desired output

If you did the following, then the cast list wouldn't change after the loop

character += " " + str(heights[i])

Note: zip(cast, height) will give you very similar output

For example,

print([c + " " + h in zip(cast, heights)]) 

Answer 2

Regarding your question:

Why are the putting cast[i] and heights[i] and not only cast/heights? If it is a enumerate function is it supposed to number all names?

When you create a for loop using enumerate() , like this:

for counter, value in enumerate(some_list):

The first variable counter is equal to the index of the list, while value is equal to the element present in the list at that index.

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