How To Input a List in Python?

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Sometimes while coding in Python, you will need to take a list as an input. While this might sound simple at first, it is often regarded as a complex task to accomplish for a beginner. This article will tell you how to input a list in Python which is derived from File Handling which is further explained by Edureka’s in-house Python trainers in the Python Certification Course.

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Following pointers will be covered in this article,

As you might already know, in order to accept an input from the user in Python, we can make use of the input() function. When used, it enables the programmer to accept either a string, integer or even a character as an input from the user. But when it comes to accepting a list as an input, the approach we follow is slightly different.

This how to input a List in Python article, will address main areas of concern

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Take a look at the example program below, which accepts a list of numbers as an input in Python.

input_string = input(“Enter a list element separated by space “) list = input_string.split() print(“Calculating sum of element of input list”) sum = 0 for num in list: sum += int (num) print(“Sum = “,sum)

When the above program is run, the output will look something like this.

Output

Enter a list element separated by space 2 4 6 9

Calculating sum of element of input list

Sum = 20

Analysis

Now let us breakdown the program and see how the workings behind it.

Moving on to the next topic of this article let us see how to input a list in python that holds strings,

Similar to the above program, we have the ability to create a program in Python to accept a list of strings from the user. Take a look at the example below to understand this better.

input_string = input(“Enter family members separated by comma “) family_list = input_string.split(“,”) print(“Printing all family member names”) for name in family_list: print(name)

When the above program is run, the output will look something like this.

Enter family members separated by comma: Julius,Mark,John

Printing all family member names

Juluis

Mark

John

Analysis

Let us breakdown the above program into pointers and understand it better.

Moving on let us see how this concept fares from programming perspective,

Examples

Let us take a look at a couple of other examples to understand how to input a list in Python.

# creating an empty list lst = [] # number of elemetns as input n = int(input(“Enter number of elements : “)) # iterating till the range for i in range(0, n): ele = int(input()) lst.append(ele) # adding the element print(lst)

Output

Let us take a look at the next example,

# try block to handle the exception try: my_list = [] while True: my_list.append(int(input())) # if input is not-integer, just print the list except: print(my_list)

Output

# number of elements n = int(input(“Enter number of elements : “)) # Below line read inputs from user using map() function a = list(map(int,input(“nEnter the numbers : “).strip().split()))[:n] print(“nList is – “, a)

This would be the final example of this article,

lst = [ ] n = int(input(“Enter number of elements : “)) for i in range(0, n): ele = [input(), int(input())] lst.append(ele) print(lst)

Output

This is it guys this brings us to the end of this article on How To Input A List In Python?

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