That's right! Chances are that you'll need to create a copy of a nested list – for instance, when you want to return an updated nested list from a function without modifying the original one. How can you do that? Here is one way:
donations = [
[345.0, 287.80, 119.27, 329.30],
[294.25, 349.0, 178.90, 262.34],
[401.0, 456.45, 289.43, 319.27]
]
new_donations = []
for day in donations:
new_day = []
for place in day:
new_day.append(place)
new_donations.append(new_day)
In the code above, we create an empty list called new_donations. Inside the outer loop, we create a temporary list called new_day, which will store all the donations for a given day. Next, we iterate over the donations from a given day and add them to new_day. When we have all donations in the list, we add the entire new_day list to the new_donations variable. Once the loop ends, new_donations is an exact copy of donations.
Create a function named remove_negative(nested_list) that accepts a nested list of numbers as shown in the template code. The function should return a copy of the nested list with all the negative numbers removed.
When copying the list, only add a given number under the following condition:
if number >= 0
