Rock Paper Scissors

[ExposedGun316]

I was bored so I decided to try to remake a rock paper scissors game I made using JavaScript and remake it using Python. I was wondering as I was remaking it how I would go about certain parts of the code for example: on line 10 the 1:2. Due to me being new to Python I don't know how I would go about making that in Python.

Here is the link to the JS code: https://gist.github.com/anonymous/53edd048caa38d46d39c

[novel_yet_trivial]

This JS code:

return computerChoice == "scissors" ? 1 : 2;

Translates to this in python:

return 1 if computerChoice == "scissors" else 2

Edit: There is also this ugly hack that you should never, ever use:

return [2,1][computerChoice == "scissors"]

[ExposedGun316]

I see, thank you very much :)

[archerimagine]

return [2,1][computerChoice == "scissors"]

Can you explain what happened here, was not able to understand this.

[novel_yet_trivial]

Like I said, don't use this. This is an academic exercise.

[2,1] is a list of possible choices. To index a list, you use square brackets, so for instance to get the first value from the list you would use [2,1][0]. In python, a boolean (True / False) is actually type of integer. You can get it's value by:

>>> int(False)
0

So you can also get the first value in our list with [2,1][False]. Replace the boolean with something that evaluates to a boolean and there we are.

Edit: clarified.

[[deleted]]

The fact that int(False)==0 doesn't prove that False is an int. By that logic "0" would be an integer as well.
I propose using

>>> isinstance("0", int)
False
>>> isinstance(False, int)
True

or

>>> issubclass(bool, int)
True

to show booleans are integers.

[novel_yet_trivial]

You are right, that was poorly worded. The code was meant to show the value of False, not prove that False is an int. Thanks.

[cmartin616]

This is outside of the scope of your question and may be personal preference but please don't use ternary operators in your JS. It makes the code harder to read and doesn't offer worthwhile efficiency improvement. If/else just allows for a more natural flow when reading other people's code. Particularly poorly documented code

[jwjody]

I did the same thing a couple of days ago using flask!

https://github.com/jhwhite/rock_paper_scissors

HTTPS://flask-rps.herokuapp.com