CODEWITHSUNDEEP
pythonlist
MuteX
MuteX

Reputation: 183

Unable to do code with list in python

I am new to python and learning from CodeAcademy.com; I have a problem:

Change list_function so that:

  1. Add 3 to the item at index one of the list.
  2. Store the result back into index one.
  3. Return the list.

Here is my code: 

def list_function(x):
    return x

n = [3, 5, 7]
n.insert(1,3)
print list_function(n)

I get only the error, what should i do?

My problem is to understand the number 2 and 3 option.

Upvotes: 0

Views: 404

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1121436

You are confusing adding with inserting, point 1:

  1. Add 3 to the item at index one of the list.

You interpreted this as insertion:

n.insert(1,3)

but really they meant the arithmetic operation:

n[1] + 3

This adds 3 (with +) tot the item at index one ([1]) of the list (n).

You then insert that back into the list at the same index:

n[1] = n[1] + 3

All this should be done inside your function:

def list_function(some_list):
    some_list[1] = some_list[1] + 3  # step 1 and 2
    return some_list                 # step 3

Upvotes: 2

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