The main problem with merging lists by index one after another is that it can cause the list to become unbalanced. If the first item in the list is at index 1, and the second item in the list is at index 2, and we merge the lists by index 1, then the first item in the resulting list will be at index 3, and the second item will be at index 4. This can cause problems when trying to access items in the resulting list; for example, if you want to access item at index 3 in the original list, but item at index 4 in the merged list, you’ll have to use an indirect reference (i.e., “item[3]”).
l1 = [1,2,3] l2 = [4,5,6] for i in range(len(l1)): l1[i] = (l1[i], l2[i]) print(l1) Output: [(1, 4), (2, 5), (3, 6)]
This code is creating a list, l1, and assigning it the values 1, 2, and 3. It is also creating a list, l2, and assigning it the values 4, 5, and 6. It is then looping through the first list (l1) and setting the value of each item in the list equal to a tuple consisting of the item’s value in l1 and its corresponding value in l2. Finally, it prints out the new list.
Work with lists
In Python, lists are a data structure that allows you to store a collection of items. Lists can be created using the list() function, and they can be accessed using the index() and len() functions.
Lists, items and index tips
Lists are a very common data structure in Python. They are similar to arrays, but they can have only one item per list. Lists can be created with the list() function, and they can also be created by using the range() function.
When working with lists, it is important to remember that each item in a list is an object. This means that you can access each item in a list using the index number (starting at 0). For example, if you wanted to get the value of the third item in a list, you would use the index number 3.
Another important thing to remember when working with lists is that you can use the len() function to determine how many items are in a list. The len() function will return the length of a list (including empty lists).
