SCIKIT Learn R2 Score
from sklearn.metrics import r2_score
r2_score(y_true, y_pred)
Easy Eagle
from sklearn.metrics import r2_score
r2_score(y_true, y_pred)from sklearn.metrics import r2_score
y_true = [3, -0.5, 2, 7]
y_pred = [2.5, 0.0, 2, 8]
r2_score(y_true, y_pred)