Create a tuple from an input in Python

Question

Here is my example:

>>> a=input ('some text : ')  # value entered is 1,1
>>> print (a)
1,1

I want as a result a tuple (1, 1)

How can I do this?

Douche

Answer 1

You could do something like

a = tuple(int(x) for x in a.split(","))

Homosexual

Answer 2

You could interpret the input as Python literals with ast.literal_eval():

import ast

a = ast.literal_eval(input('some text: '))

This function will accept any input that look like Python literals, such as integers, lists, dictionaries and strings:

>>> ast.literal_eval('1,1')
(1, 1)

Logan

I used this function in one of my programs to take tuple input as well, so I wrapped it with the tuple() function and put it all in a try/except case to prevent things like functions being entered as input and insure that only tuples were entered – Scrofulous

@samrap: ast.literal_eval() doesn't support entering functions. Only literals are supported; strings, booleans, numbers, lists, tuples, dictionaries and None. That's it. – Logan

@samrap: You can always use a more explicit method (like jonrsharpe posted) or use isinstance(result, tuple) to ensure that only tuples are being entered. – Logan

Answer 3

It can be done in the following way.

a = '3, 5, 7, 23'

out = tuple(map(int, a.split(",")))

print(out)

(3, 5, 7, 23)

Diggings

Answer 4

It's very simple.

 tup = tuple(input("enter tuple"))
 print(tup)    

This will work.

Airdrome

It will not really work. The input is a string, and passing that to tuple() will create a tuple from the string's characters. So for example, for the OP's input of 1,1, your code will output ('1', ',', '1') – Ulrikaumeko

Answer 5

>>> a = input()
(21, 51, 65, 45, 48, 36, 8)
>>> m = eval(a)
>>> type(m)
<class 'tuple'>

Johnnyjohnnycake

Eval has its own drawback – Teodoor

This is not a good option: please review Using python's eval() vs. ast.literal_eval()?. ast.literal_eval is already posted as an answer here. – Carangid