How do I iterate over multiple lists?

How do I iterate over multiple lists?

We can iterate over lists simultaneously in ways:

1. zip() : In Python 3, zip returns an iterator. zip() function stops when anyone of the list of all the lists gets exhausted. In simple words, it runs till the smallest of all the lists.
2. itertools. zip_longest() : zip_longest stops when all lists are exhausted.

How do you iterate through two lists in Python?

Use zip() and a for-loop to iterate over two lists

1. list1 = [“a”, “b”, “c”]
2. list2 = [1, 2, 3, 4]
3. zip_object = zip(list1, list2)
4. for element1, element2 in zip_object:
5. print(element1, element2)

How do I iterate over a list in Python?

Use a nested for-loop to iterate through a nested list. Use a for-loop to iterate through every element of a list. If this list contains other lists, use another for-loop to iterate through the elements in these sublists.

How do you use multiple lists in Python?

Python | Initializing multiple lists

1. Method #1 : Using * operator. We can enlist all the required list comma separated and then initialize them with an empty list and multiply that empty list using the * operator by the number of lists specified.
2. Method #2 : Using loop.
3. Method #3 : Using defaultdict()

Can we multiply two lists in Python?

Multiply Two Lists in Python Using the numpy. The multiply() method of the NumPy library in Python, takes two arrays/lists as input and returns an array/list after performing element-wise multiplication.

How do you loop multiple variables in Python?

Use a for Loop for Multiple Variables in Python

1. Use the for Loop for Multiple Assignments in a Dictionary in Python.
2. Use the enumerate() Function for Multiple Assignments in a List in Python.
3. Use the zip() Function for Multiple Assignments in a Tuple or a List in Python.

How do you iterate through a string list in Python?

Iterate over the list using while loop

1. Fist get the size of list.
2. Then iterate using while loop from 0 to len(list) – 1.
3. In each iteration access iTh element.

How do you iterate through a list backwards in Python?

reversed() function reversed() is a Python built-in function that returns a reversed iterator of a given iterable object. The original list is not modified. If you only want to iterate over the list’s elements in reverse order prefer using the reversed() function, as it is faster than reversing the elements in place`.

How do you add a 3 list in Python?

Python 3 – List append() Method

1. Description. The append() method appends a passed obj into the existing list.
2. Syntax. Following is the syntax for append() method − list.append(obj)
3. Parameters. obj − This is the object to be appended in the list.
4. Return Value.
5. Example.
6. Result.

How do I create a list with multiple lists in Python?

In python, we can use the + operator to merge the contents of two lists into a new list. For example, We can use + operator to merge two lists i.e. It returned a new concatenated lists, which contains the contents of both list_1 and list_2.

What happens if you multiply a list in Python?

If you multiply a number with a list it will repeat the items of the as the size of that number. If you want a pure Python-based approach using a list comprehension is basically the most Pythonic way to go.