Write a program to create array of 2 lists in Python

In this tutorial, we will learn about create array of 2 lists in Python with a coding example. In many situations, you might have to come up with this type of requirements.
I know you are here just because you are in need of this trick to create array of 2 lists that means user get a array which is made by combination of 2 list and values are always users input.
If you don’t know how to create array of 2 lists using string list and array, then you are at the right place. Because in this tutorial we will understand how we can create array of 2 lists using Python. And this method choose to save time and hustle.

Create array of 2 lists in Python

Let’s learn this with a easy coding example,
1. At first, Function Definition –

def get_list_from_input(prompt):

• The function get_list_from_input takes one parameter, prompt, which is a string used to prompt the user for input.

2. Then User Input Function –

input_string = input(prompt)

• input(prompt) displays the prompt message and waits for the user to type in a response.
• The response is captured as a string in input_string.

3. Then Processing Input –

return [int(x) for x in input_string.split()]

• input_string.split() splits the input string into a list of substrings based on spaces. For example, if the user inputs "1 2 3", it will be split into ["1", "2", "3"].
• [int(x) for x in input_string.split()] is a list comprehension that iterates over each substring, converts it to an integer using int(x), and collects these integers into a new list.
• Return Statement: The function returns the list of integers created from the input string.

4. After that, Getting List1 from the User –

list1 = get_list_from_input("Enter the elements of the first list separated by spaces: ")

 Calling the Function:

• get_list_from_input("Enter the elements of the first list separated by spaces: ") prompts the user to enter the elements of the first list. The entered values are converted into a list of integers and assigned to list1.

5. Then Getting List2 from the User –

list2 = get_list_from_input("Enter the elements of the second list separated by spaces: ")

 Calling the Function:

• get_list_from_input("Enter the elements of the second list separated by spaces: ") does the same for the second list, assigning the result to list2.

6. Next Creating the Array of Lists –

array_of_lists = [list1, list2]

 Combining Lists:

• array_of_lists is created as a list containing list1 and list2. So, array_of_lists is a nested list where the first element is list1 and the second element is list2.

7. Finally, Printing the Result Section –

print("Array of lists:", array_of_lists)

•  This line prints the message "Array of lists:" followed by the contents of array_of_lists.
• The printed output will show the two lists as a nested list.

Python Code – “Create array of 2 lists in Python”

def get_list_from_input(prompt):
    # Prompt the user for input
    input_string = input(prompt)
    
    # Convert the input string into a list of integers
    # Split the input string by spaces and convert each part to an integer
    return [int(x) for x in input_string.split()]

# Get two lists from the user
list1 = get_list_from_input("Enter the elements of the first list separated by spaces: ")
list2 = get_list_from_input("Enter the elements of the second list separated by spaces: ")

# Create the array of lists
array_of_lists = [list1, list2]

# Print the result
print("Array of lists:", array_of_lists)

Let’s take an Input,
If the user enter First List – 15 5 2 6 7 888 9 3
If the user enter Second List – 5 4 7 9 31 78 5 2 5

Then the Output :

Enter the elements of the first list separated by spaces: 15 5 2 6 7 888 9 3
Enter the elements of the second list separated by spaces: 5 4 7 9 31 78 5 2 5
Array of lists: [[15, 5, 2, 6, 7, 888, 9, 3], [5, 4, 7, 9, 31, 78, 5, 2, 5]]

Summary

• Define a Function: get_list_from_input to convert user input into a list of integers.
• Get User Input: Use the function twice to get two lists.
• Combine Lists: Create a list of these two lists.
• Print Result: Display the combined list of lists.

This sequence of steps results in a nested list where each sub-list contains integers provided by the user.

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