Init an indefinite number of class

[MathisDELAGE]

Hello world,
I need your help for my new game project.
I want to use x(the number of player) time my class Player.
I think do that but it's not optimum.

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from MyClass import Player x = int(input("Number of player: "))   for i in range(1, x+1):     exec(f"Player{i} = Player()")

Except that I need to do this for each round of the game.
Can you recommend something better?
Thank you in advance.

[ndc85430]

You shouldn't be using exec, you should be storing the items in a collection (e.g. tuple, list, set, or dict as appropriate).

[MathisDELAGE]

You shouldn't be using exec, you should be storing the items in a collection (e.g. tuple, list, set, or dict as appropriate).

I see thank you

[dboxall123]

I don't understand what you're doing on that bottom line, couldn't you just do this?:

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players = [] for i in range(1, x+1):     players.append(Player())

Or maybe even:

1	players = [Player()] * x

[ndc85430]

Do you not know about collections of things at all? How are you learning Python? Collections should be covered in whatever introductory book, course, etc. you're using, as they're pretty fundamental.

[MathisDELAGE]

I don't understand what you're doing on that bottom line, couldn't you just do this?:

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players = [] for i in range(1, x+1):     players.append(Player())

Thanks it's exatly what I want to do
I don't know why I'm not think to that before

[ndc85430]

Really, that's nearer as a list comprehension: players = [Player() for _ in range(1, x + 1)]

[dboxall123]

Really, that's nearer as a list comprehension: players = [Player() for _ in range(1, x + 1)]

Wouldn't this be easier players = [Player()] * x

[MathisDELAGE]

I don't understand what you're doing on that bottom line, couldn't you just do this?:

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players = [] for i in range(1, x+1):     players.append(Player())

Or maybe even:

1	players = [Player()] * x

I know but I'm don't know why I don't thing to that before

[deanhystad]

Wouldn't this be easier players = [Player()] * x

Nope. If you do this you end up with 1 player. players[0] would be the same player as players[1] and so on. This is a common problem where programmers try to create a list of mutable objects using the "*" operator.

Nobody complains if "numbers = [0] * count" returns a list where numbers[0] is numbers[1], but it is usually not the desired result when trying to make a list of lists. "lists = [[]] * count" works exactly the same as "numbers", where lists[0] is lists[1]. In both cases you have a list holding a single value that is used to create a list holding multiple of the value. if you want a different value for each item in the list you need a different generator.

To make a list containing different numbers you might do this

1	numbers = [number for number in range(count)]

To build a list of different lists you do this:

1	lists = [[] for _ in range(count)]

And to build a list of different players you do this:

1	players = [Player() for _ in count]