Make a Set of Lists in Python

Below are various ways to make a set of lists in Python:

Using list() Function
Using Dictionary
Using List Comprehension
Using append() Function

Creating a Set of List Using list() Function

It takes a single item or an iterable item and converts it to a list. The list() constructor is a very easy and widely used method for converting an item into a list in Python. In this example, we are using list() function to combine multiple lists into a single list.

Python3

list1 = [1, 23, 65] 
colors = ["red", "orange", "green"] 
names = ["Diwakar", "Aniket", "Ritik"] 
  
#Printing lists 
print("List 1 : ",list1) 
print("List 2 : ",colors) 
print("List 3 : ",names) 
  
# Organizing the lists into a set (using a list) 
set_of_lists = [list1, colors, names] 
  
# Printing the combined list 
print("Combined list:", set_of_lists) 

Output

List 1 :  [1, 23, 65]
List 2 :  ['red', 'orange', 'green']
List 3 :  ['Diwakar', 'Aniket', 'Ritik']
Combined list: [[1, 23, 65], ['red', 'orange', 'green'], ['Diwakar', 'Aniket', 'Ritik']]

Make A Set Of Lists Using Dictionary

In this method, our goal is to create a set of list using dictionary and name each list. Dictionary can also be used for creating a set of list in Python.

Python3

list1 = [1, 2, 3] 
list2 = ['a', 'b', 'c'] 
list3 = [10.5, 20.3, 30.7] 
  
#Printing the list 
print("First list :",list1) 
print("Second list :",list2) 
print("Third list :",list3) 
  
# you can use a dictionary to name each list 
named_set_of_lists = {'numbers': list1, 'letters': list2, 'floats': list3} 
  
# Print the combined list 
print("Combined list :",named_set_of_lists)

Output

First list : [1, 2, 3]
Second list : ['a', 'b', 'c']
Third list : [10.5, 20.3, 30.7]
Combined list : {'numbers': [1, 2, 3], 'letters': ['a', 'b', 'c'], 'floats': [10.5, 20.3, 30.7]}

Combine Multiple Lists Using List Comprehension

List Comprehension is used for solving our problem in less number lines of Code. But here we can also use list comprehension of Python for creating list of list in Python.

Python3

list1 = [1, 2, 3] 
list2 = ["a", "b", "c"] 
  
#Print the lists 
print("List 1 : ",list1) 
print("List 2 : ",list2) 
  
# Using set comprehension 
set_of_lists = [list(lst) for lst in [list1, list2]] 
  
#Printing the Combined List 
print("The Combined List : ",set_of_lists) 

Output

List 1 :  [1, 2, 3]
List 2 :  ['a', 'b', 'c']
The Combined List :  [[1, 2, 3], ['a', 'b', 'c']]

Create a Set of Multiple Lists Using append() Method

In this example, we are using append() method to create a set of lists in which we will append all the list into a single list creating a set of lists.

Python3

list1 = [1, 2, 3] 
list2 = ['Charles', 'Jim', 'Bran','Arya'] 
  
#Printing the list 
print("List 1 is : ",list1) 
print("List 2 is : ",list2) 
  
# Initializing an empty List 
combined = [] 
  
# Using append() method 
combined.append(list1) 
combined.append(list2) 
  
print("Combined list : ",combined) 

Output

List 1 is :  [1, 2, 3]
List 2 is :  ['Charles', 'Jim', 'Bran', 'Arya']
Combined list :  [[1, 2, 3], ['Charles', 'Jim', 'Bran', 'Arya']]