¿Cómo se asigna una lista a otra en Python?

How do you assign one list to another in python?

To actually copy the list, you have various possibilities:

1. You can use the builtin list.copy() method (available since Python 3.3): new_list = old_list.copy()
2. You can slice it: new_list = old_list[:]
3. You can use the built in list() function: new_list = list(old_list)

Method 2: Add two list using the Comprehension List

1. # initialize the Python lists.
2. lt1 = [2, 4, 6, 8, 10, 30]
3. lt2 = [2, 4, 6, 8, 10, 12]
4. # print the original list element.
5. print ( ” Python list 1 : ” + str (lt1))
6. print ( “Python list 2 : ” + str (lt2))
7. # use list comprehension to add two lists.

Ways to concatenate two lists in Python

1. Method #1 : Using Naive Method.
2. Method #2 : Using + operator.
3. Method #3 : Using list comprehension.
4. Method #4 : Using extend()
5. Method #5 : Using * operator.
6. Method #6 : Using itertools.chain()

When you copying a list to another list using = sign, both the list refer to the same list object in the memory. So modifying one list, other automatically changes as they both refer to same object. To copy a list use slice operator or copy module.

Append multiple lists at once in Python

1. Using + operator. The + operator does a straight forward job of joining the lists together.
2. With zip. The zip function brings together elements form each of the lists from the same index and then moves on to the next index.
3. With itertools. chain.

You then used the assignment operator = to assign the memory location of listOne to listTwo. Somebody mentioned you can use the slice operator : but that gives you a Shallow Copy. If you’re not familiar with the difference between Shallow and Deep Copy, read these docs.

Depending on the need of the program we may an requirement of assigning the values in a list to many variables at once. So that they can be further used for calculations in the rest of the part of the program.

We generally come through the task of getting certain index values and assigning variables out of them. The general approach we follow is to extract each list element by its index and then assign it to variables. This approach requires more line of code.

You will often times need to check if an item exists in a particular list. Python provides a very useful operator that allows you to quickly test if an object is a member of a list or not. This is the in operator. In fact, the in operator works for any python sequence types (strings, tuples, and lists).