[Python] TypeError: 'int' object is not subscriptable in samply python code [closed]

I am playing with this project https://github.com/thabbott/prisoners-dilemma

and when running tournament.py I get that error in this block of code.

TypeError: 'int' object is not subscriptable in sample python code

from itertools import combinations
from random import shuffle
import time
import numpy as np
import matplotlib.pyplot as plt
import ctypes

"""
Prisoners' dilemma tournament
"""
class Tournament():

"""
Initialize the tournament

Parameters
----------
prisoners: list of competing Prisoner subclasses
n_rounds: rounds per match
n_repl: number of replicants of each species
"""
def __init__(self, species, n_rounds, n_repl):
self.species = species
self.frequency = len(self.species) * [0.0]
for ii in range(len(self.species)):
self.frequency[ii] = 1.0 * n_repl[ii] / sum(n_repl)
self.population_size = sum(n_repl)
self.n_rounds = n_rounds
self.fitness_history = []
self.frequency_history = []
self.fitness_history.append(len(self.species) * [np.nan])
self.frequency_history.append(self.frequency.copy())
self.is_extinct = len(self.species) * [False]
self.repopulate()


specifically at this line

self.frequency[ii] = 1.0 * n_repl[ii] / sum(n_repl)


I am trying to figure out what it is trying to do. I get that it is indexing an integer but I don't understand the original intent or how to fix it.

anyone have any ideas?

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