How to get the first 5 correct values from a cycle?

Question

I am training a machine with reinforcements, everything is going well, but the task is to get the number of the game in which 5 victories were won in a row.

The algorithm consists of a loop that calculates 10,000 games, in each of which the agent walks on a frozen lake using 100 steps (for each game). If the agent correctly passes the lake, this is considered a victory, and so 10,000 games (iterations).
I got 7914 winning games – this is the correct answer.

And the next question is:
Complete the following code so that as a result of training the model, you can find out the number of wins and the number of the game (game) in which the agent won the fifth win in a row for the first time.

Here is my code:

for game in tqdm(range(total_games)):
    //BODY OF CYCLE
    success += reward # COUNTS WINNING GAMES

I need a simple algorithm that will select the first five wins in a row and put it in a variable. Something like this, but it’s of course wrong:

if success==5: 
        game5Success = game

Asked By: 0xYanis

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Source

Answer 1

I assume reward is 0 if the game was lost and 1 if it was won. If so, then you’re gonna need to store two different results. Something like:

for game in tqdm(range(total_games)):
    //BODY OF CYCLE
    success += reward # COUNTS WINNING GAMES
    wins_in_a_row = wins_in_a_row + reward if reward else 0 # COUNTS WINS IN A ROW

And then you can get your fifth game in the same way:

if wins_in_a_row == 5: 
        game5Success = game

Answered By: ep742

Answer 2

Since I don’t have more information I created an own little example. You should get the idea.

Create a seperate counter, which also adds 1 when the game is one. If the game isn’t won, the counter resets to 0.

# [random.choice([1,0]) for i in range(25)] 
# resulted in this:
lst = [0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1]

counter = 0
success = 0
only_first = True

for idx, num in enumerate(lst):
    if num == 1: # equivalent to win this game
        success += 1 # or reward, but I guess it is just plus 1
        counter += 1
    else: 
        counter = 0 # reset Counter if game isn't a win
        
    if counter == 3 and only_first: # check for the number of consecutive wins you want to know and if it is the first time
        print(f"First 3 successively won games at game No: {idx}")
        only_first = False

Output:

First 3 successively won games at game No: 6

Answered By: Rabinzel

How to get the first 5 correct values from a cycle?

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