import numpy as np
from sklearn.metrics import accuracy_score

y_pred = [0, 2, 1, 3]
y_true = [0, 1, 2, 3]
score1 = accuracy_score(y_true, y_pred)    
print(score1)

0.5

score2 = accuracy_score(y_true, y_pred, normalize=False)
print(score2)

2