Multiple Inputs From User in Python | Python Input Program

by Rohit Sharma

Rohit Sharma is the Program Director for the UpGrad-IIIT Bangalore, PG Diploma Data Analytics Program.

Last Updated: Jan 29, 2021

6 min read

Table of Contents

Introduction

Programmers often want to create programs where users can enter multiple inputs in Python. They then perform several operations on the input provided by the user. Some inbuilt functions can be used multiple times to take input directly from the user such as raw_input () and input () in data science. Writing the same functions multiple times in a code makes the file heavy and increases code complexity. In this blog, we are going to discuss several methods that collect multiple inputs from the user in one line and reduce code length.

Split () function
Map () function
List comprehension

Collection Multiple Inputs in Python From User

Using Split () Function

With the help of the split () function, developers can easily collect multiple inputs in Python from the user and assign all the inputs to the respective variables. Developers can specify a character that will be used as a separator to break the input provided by the user. If the developer is not providing any separator, then the user input is broken by white space. Usually, this method is used to break a python string into multiple substrings, but it can also be used to collect multiple inputs from the user.

The syntax that is used for the split () method is as follows:

var1, var2 = input (“Type what type of input you want to collect from the user”). split (“/”) for / separated input

var1, var2 = input (“Type what type of input you want to collect from the user”). split () for white space separated input

Example of Split () Function

# Python program for breaking Python string into substring

# taking multiple inputs from the user using the split () function

# collecting three inputs at a time

a, ,b, c = input (“Enter your child age: “).split ()

print(“Enter your elder son’s age: “, a)

print(“Enter your daughter’s age: “, b)

print(“Enter your younger son’s age: “, c)

print()

# collecting four inputs at a time

a, b, c, d = input(“Enter the count of fruits: “).split()

print(“Enter the number of apples you have: “, a)

print(“Enter the number of oranges you have: “, b)

print(“Enter the number of mangoes you have: “, c)

print(“Enter the number of bananas you have: “, d)

print()

# taking two inputs at a time

x, y = input(“Enter your marks: “).split()

print(“Marks obtained in physics is {} and the mark obtained in chemistry is {}”.format(x, y))

print()

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The Output for the Above Program is as Follows

Enter your child age: 25 20 14

Enter your elder son’s age: 25

Enter your daughter’s age: 20

Enter your younger son’s age: 14

Enter the count of fruits: 5 15 13 23

Enter the number of apples you have: 5

Enter the number of oranges you have: 15

Enter the number of mangoes you have: 13

Enter the number of bananas you have: 23

Enter your marks: 96 84

Marks obtained in physics is 96 and the mark obtained in chemistry is 84

Using Map () Function

map () is the other function used by the developers to take multiple inputs from the user. The syntax for map () function is as follows:

var1, var, var = map(int,input().split())

Example of Map () Function

#collecting multiple inputs in Python using map () function

a, b = map (int, input(“Enter the count of fruits you have: “).split())

print(“Enter the count of apples you have: “, a)

print(“Enter the count of oranges you have: “, b)

The Output for the Above Program is as Follows

Enter the count of fruits you have: 30 50

Enter the count of apples you have: 30

Enter the count of oranges you have: 50

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Using List () Function

List () is one of the functions used in Python language to define and create a list. List function works similarly as a mathematical statement in one line. It is also used by developers to collect multiple inputs in Python from the user. List () function collects multiple inputs of different data at the same time.

The syntax for creating a list is as follows:

a, b = [afora input(“Type what type of input you want to collect from the user “).split()]

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Example for List () Function

# Python program for breaking Python string into substring

# taking multiple inputs from the user using list comprehension

# taking three input at a time

a, b, c = [int(a) for a in input(“Enter the marks obtained: “).split()]

print(“Enter the marks obtained in physics: “, a)

print(“Enter the marks obtained in chemistry: “, b)

print(“Enter the marks obtained in English: “, c)

print()

# taking two input at a time

a, b = [int(a) for a in input(“Enter your child’s age: “).split()]

print(“Enter the age of elder son: “, a)

print(“Enter the age of younger son: “, b)

print()

# taking three inputs at a time

A, b, c = [int(a) for a in input(“Enter the count of fruits: “).split()]

print(“The total number of apples are {} and oranges are {}”.format(a, b))

print()

# taking multiple inputs at a time

a = [int(a) for a in input(“Enter multiple value: “).split()]

print(“The value entered by you are: “, a)

The Output of the Above Program is as Follows

Enter the marks obtained: 94 90 96

Enter the marks obtained in physics: 94

Enter the marks obtained in chemistry: 90

Enter the marks obtained in English: 96

Enter your child’s age: 34 23

Enter the age of elder son: 34

Enter the age of younger son: 23

Enter the count of fruits: 76 23

The total number of apples are 76 and oranges are 23

Enter multiple value: 23 45 76 48 90 76

The value entered by you are: [23, 45, 76, 48, 90, 76]

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Conclusion

The code given in this blog is for example purpose and can be modified as per an individual’s needs.

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Why is list comprehension considered superior to loop?

List comprehension is a superior way of taking multiple inputs in Python, even better than the conventional loop process in many ways:
1. List comprehension is much faster and compact than the loop since it collects all the elements first and inserts them all together at once.
2. The same thing that a loop does in a block can be done in a single line using a list comprehension, making the code cleaner and more user-friendly.
3. Resolving a matrix into a vector and list filtration are some of the best examples where the list comprehensions can be seen outperforming a loop.

How can I take multiple inputs in my program?

Python provides multiple ways of taking input. There are three significant ways of taking input that is mentioned below:
1. Using split(): The split() function is widely used to take multiple inputs In Python from the user. It accepts a separator as its parameter which determines which character will be used to separate the string. The syntax of the split() function is:
string.split(separator, maxsplit)
2. Using map(): The map() is another way of taking inputs from the user. The syntax of the map() function in Python is:
map(func, ite)
3. Using List comprehensions: This method is the most optimized of all three methods. It is the most convenient and elegant way of creating a list in Python. However, we can also take multiple inputs in Python from the user through this method.

Name some of the most used built-in methods provided by Python.

Python has gained a lot of popularity among programmers and developers, and most of the credit goes to the built-in functions and methods it provides. These functions save a lot of time and reduce code length, thus making Python the first choice for projects.
The following are some of the most popular and useful Python built-in functions and methods:
1. bin(): This function takes an integer as an argument and returns its binary string.
2. dict(): This function accepts a collection of items and creates a dictionary with key-value pairs.
3. abs(): This function accepts a number as an argument and returns its absolute value.
4. ascii():This function takes a string as an argument and returns it in a readable format by replacing the non-ASCII characters with x, u or U escapes.

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Multiple Inputs From User in Python | Python Input Program

Introduction