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How to Convert a Set to List in Python?

Python Set To List

We can convert a Set to List in Python using the built-in list() method. Let’s take a look at some examples using this function.

Methods to Convert a Set to List in Python

We’ll go over simple methods that will allow the conversion of a python set object to a list object quickly.

1. Using list() Function

The list() function takes an iterable as an argument and converts that into a List type object. This is a built-in method ready for you to use.

my_list = list(my_iterable)

Since a set is also iterable, we can pass it into the list() method and get our corresponding list.

my_set = set({1, 4, 3, 5})

my_list = list(my_set)

print(my_list)

The output, as expected, will be a list containing the above values.

[1, 3, 4, 5]

Note that the order of the list can be random, and not necessarily sorted.

For example, take the below snippet.

s = set()
s.add("A")
s.add("B")

print(list(s))

Output in my case:

['B', 'A']

2. Using Manual Iteration

We can also manually add the elements to the list since the set is iterable. This method does not have any real-world advantage over using the list() method apart from being written by you.

s = set({1, 2, 3})

a = []

for i in s:
    a.append(i)

print(a)

Again, the output is a list:

[1, 2, 3]

Convert a frozenset to a list

The Python frozenset object is similar to a set but is immutable. Therefore, we cannot modify the elements of a frozenset. We can convert this type of set too, using list().

f_set = frozenset({1, 3, 2, 5})

a = list(f_set)

print(a)

Output

[1, 2, 3, 5]

References