Is it possible to make multiple assignments using a conditional expression?

Question

Here is the example:

age = 10
reject = False
if age < 10:
 st = 'Kid'
 reject = True
else:
 st='Adult'
 reject = False

Is it possible? Something like:

statement1:statement2 if age < 10 else statement3:statment4

I am still having problems with understanding ternary operator in Python.

• Terry Jan Reedy: The syntax you requested is not possible. The conditional expression syntax is true-expression if condition else false-expression.
• wim: @TerryJanReedy Well, you can actually bind names with expressions. globals().__setitem__('st', 'Kid'), for example.
• juanpa.arrivillaga: Just use the if-else statement. There is no good reason to try to cram your code into a single line, especially if it requires weird, unidiomatic usage of language constructs not meant to achieve that.

Answer 1

Assignment statements support multiple targets:

>>> age = 10
>>> st, reject = ('Kid', True) if age < 10 else ('Adult', False)
>>> st, reject
('Adult', False)

• metazord: is there another possible way??? assuming that if kid < 20, if less than 20 ONLY assign "rejected=True" and for adult assign st="Adult" and Rejected=False
• wim: Technically possible, but ugly. Just use an if statement and stop trying to be so fancy.

Answer 2

You could do it like this:

st, reject = ('Kid', True) if age < 10 else ('Adult', False)

• metazord: is there another possible way??? assuming that if kid < 20, if less than 20 ONLY assign "rejected=True" and for adult st="Adult" and Rejected=False
• rammelmueller: other than st, reject = (None, True) if age < 20 else ('Adult', False) i can't think of anything off the top of my head

Answer 3

You can use:

st, reject = ('Kid', True) if age < 10 else ('Adult', False)

When you use:

var1, var2 = 1, 2

You are doing the same as:

var1 = 1
var2 = 2

And when you use:

var1 = 1 if x == y else 2

Your are doing the same as:

if x == y:
 var1 = 1
else:
 var1 = 2

If you want with this define multiples variables you have to make a tuple () with the variables and they will be unpacked.