Creating a Tuple or a Set from user Input in Python

# Table of Contents

1. Creating a Tuple from user Input in Python
2. Creating a Set from user Input in Python

# Creating a Tuple from user Input in Python

To create a tuple from user input:

1. Use the input() function to take input from the user.
2. Use the str.split() function to split the input string into a list.
3. Use the tuple() class to convert the list to a tuple.

Copied!
import ast

# ✅ create a tuple from string user input

my_tuple = tuple(input('Enter space-separated words: ').split())

print(my_tuple)

# -------------------------------

# ✅ create a tuple from integer user input

user_input = input('Enter space-separated integers: ')

my_tuple = tuple(int(item) for item in user_input.split())

print(my_tuple)

We used the input() function to take input from the user.

The input() function takes an optional prompt argument and writes it to standard output without a trailing newline.

The function then reads the line from the input, converts it to a string and returns the result.

We used the str.split() method to split the user input string on each whitespace character.

Copied!
my_tuple = tuple(input('Enter space-separated words: ').split())

print(my_tuple)

The str.split() method splits the string into a list of substrings using a delimiter.

You can also use another string separator, e.g. a comma.

Copied!
my_tuple = tuple(input('Enter comma-separated words: ').split(','))

print(my_tuple)

The str.split() method splits the input string on each comma.

# Creating a tuple of integers from user input

If you need to create a tuple of integers from user input, use a generator expression to convert each input string to an integer.

Copied!
user_input = input('Enter space-separated integers: ')

my_tuple = tuple(int(item) for item in user_input.split())

print(my_tuple)

We used the str.split() function to split the input string on each whitespace character.

We then used a generator expression to iterate over the list.

On each iteration, we use the int() class to convert the input string to an integer.

# Creating a tuple from user input with literal_eval

Alternatively, you can use the ast.literal_eval method.

Copied!
import ast


try:
    input_list = ast.literal_eval(
        input('Enter a valid Python tuple, e.g. ("a", "b"): ')
    )
except ValueError:
    print('The provided value is not a tuple')

print(input_list)  # 👉️ ('a', 'b')

The ast.literal_eval() method allows us to safely evaluate a string that contains a Python literal.

This assumes that the expected input is a valid Python tuple, e.g. (1, 2, 3).

# Creating a Set from user Input in Python

To create a set object from user input:

1. Use the input() function to take input from the user.
2. Use the str.split() function to split the input string into a list.
3. Use the set() class to convert the list to a set object.

Copied!
import ast

# ✅ create a set from string user input

my_set = set(input('Enter space-separated words: ').split())

print(my_set)

# -------------------------------

# ✅ create a set from integer user input

user_input = input('Enter space-separated integers: ')

my_set = set(int(item) for item in user_input.split())

print(my_set)

We used the input() function to take input from the user.

The input() function takes an optional prompt argument and writes it to standard output without a trailing newline.

The function then reads the line from the input, converts it to a string and returns the result.

We used the str.split() method to split the user input string on each whitespace character.

Copied!
my_set = set(input('Enter space-separated words: ').split())

print(my_set)

The str.split() method splits the string into a list of substrings using a delimiter.

You can also use another string separator, e.g. a comma.

Copied!
my_set = set(input('Enter comma-separated words: ').split(','))

print(my_set)

The str.split() method splits the input string on each comma.

# Creating a set of integers from user input

If you need to create a set of integers from user input, use a generator expression to convert each input string to an integer.

Copied!
user_input = input('Enter space-separated integers: ')

my_set = set(int(item) for item in user_input.split())

print(my_set)

We used the str.split() function to split the input string on each whitespace character.

We then used a generator expression to iterate over the list.

On each iteration, we use the int() class to convert the input string to an integer.

# Creating a set from user input with literal_eval()

Alternatively, you can use the ast.literal_eval method.

Copied!
import ast


try:
    input_list = ast.literal_eval(
        input('Enter a valid Python set, e.g. {"a", "b"}: ')
    )
except ValueError:
    print('The provided value is not a set object')

print(input_list)  # 👉️ ('a', 'b')

The ast.literal_eval() method allows us to safely evaluate a string that contains a Python literal.

This assumes that the expected input is a valid Python set, e.g. {1, 2, 3}.

# Additional Resources

You can learn more about the related topics by checking out the following tutorials:

• Taking user input boolean (True/False) values in Python
• How to Create a Date from user Input in Python
• Taking a file path from user input in Python
• How to take Float user input in Python
• Multiple lines user Input in Python
• Only accept a single character from user Input in Python
• How to Validate user input in Python
• Yes/No question with user input in Python
• EOFError: EOF when reading a line in Python [Solved]