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?

score 14 · Answer 1 · answered Dec 09 '13 at 22:46

14

You could do something like

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

answered Dec 09 '13 at 22:46

jonrsharpe

score 10 · Answer 2 · answered Dec 09 '13 at 22:45

10

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)

answered Dec 09 '13 at 22:45

Martijn Pieters

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 – samrap Dec 09 '13 at 22:51
@samrap: `ast.literal_eval()` doesn't support entering functions. Only literals are supported; strings, booleans, numbers, lists, tuples, dictionaries and `None`. That's it. – Martijn Pieters Dec 09 '13 at 22:53
@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. – Martijn Pieters Dec 09 '13 at 22:54

score 0 · Answer 3 · edited Sep 14 '21 at 22:20

0

It's very simple.

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

This will work.

edited Sep 14 '21 at 22:20

Alex Waygood

answered Jul 02 '19 at 01:45

Sudarshan

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')` – Tomerikoo Aug 30 '21 at 16:46

J.Jai · Answer 4 · 2022-05-18T17:02:04.837

0

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)

edited May 18 '22 at 17:02

answered May 18 '22 at 16:52

J.Jai

score -2 · Answer 5 · edited Aug 30 '21 at 16:43

-2

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

edited Aug 30 '21 at 16:43

Tomerikoo

answered Aug 30 '21 at 11:05

Tefna Mintamol

1

Eval has its own drawback – eroot163pi Aug 30 '21 at 14:43
1

This is not a good option: please review [Using python's eval() vs. ast.literal_eval()?](https://stackoverflow.com/q/15197673/7758804). `ast.literal_eval` is already posted as an answer here. – Trenton McKinney Aug 30 '21 at 15:47

5 Answers5