[Tut] Convert Tuple to List - Printable Version

[Tut] Convert Tuple to List - Printable Version

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[Tut] Convert Tuple to List - xSicKxBot - 04-25-2020

Convert Tuple to List

Problem: Given a Python tuple with

Code:
n

elements. How to convert it into a list with the same

Code:
n

elements?

Examples:

Convert tuple
Code:
(1, 2, 3, 4, 5)
into list
Code:
[1, 2, 3, 4, 5]
.
Convert tuple
Code:
('Alice', 'Bob', 'Ann')
into list
Code:
['Alice', 'Bob', 'Ann']
.
Convert tuple
Code:
(1,)
into list
Code:
[1]
.

Note Tuple: Tuples are similar to lists—with the difference that you cannot change the tuple values (tuples are immutable) and you use parentheses rather than square brackets.

Solution: Use the built-in Python

Code:
list()

function to convert a list into a tuple. You don’t need to import any external library.

Code: The following code converts the three given tuples into lists.

Code:
tuple_1 = (1, 2, 3, 4, 5)
print(list(tuple_1))
# [1, 2, 3, 4, 5] tuple_2 = ('Alice', 'Bob', 'Ann')
print(list(tuple_2))
# ['Alice', 'Bob', 'Ann'] tuple_3 = (1,)
print(list(tuple_3))
# [1]

Try It Yourself: With our interactive code shell, you can try it yourself. As a small exercise, try to convert the empty tuple

Code:
()

into a list and see what happens.

https://repl.it/@finxter/tupletolist?lite=true

Explanation: You can see that converting a tuple with one element leads to a list with one element. The

Code:
list()

function is the easiest way to convert a tuple into a list. Note that the values in the tuple are not copied—only a new reference to the same element is created:

[Image: list_to_tuple-1024x576.jpg]

The graphic also shows how to convert a tuple back to a list by using the

Code:
tuple()

function (that’s also a Python built-in function). Thus, calling

Code:
list(tuple(lst))

on a list

Code:
lst

will result in a new list with the same elements.

Related articles:

Try to execute this code with the interactive Python tutor:

https://pythontutor.com/iframe-embed.html#code=list_1%20%3D%20%5B'Alice',%20'Bob',%20'Ann'%5D%0Atuple_1%20%3D%20tuple%28list_1%29%0Alist_2%20%3D%20list%28tuple_1%29%0A%0Aprint%28list_1%29%0Aprint%28tuple_1%29%0Aprint%28list_2%29%0A&codeDivHeight=400&codeDivWidth=350&cumulative=false&curInstr=6&heapPrimitives=nevernest&origin=opt-frontend.js&py=3&rawInputLstJSON=%5B%5D&textReferences=false