python - Getting problem in creating a new column from existing columns of a numpy array

Question

I am using the IRIS dataset. While Creating a new column for volume in iris_2d, volume is (pi * petal_length * sepal_length^2)/3

The error comes in this code...

url = 'https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data'
iris = np.genfromtxt(url, delimiter=',', dtype='object')
species = iris[:, 4]

np.random.seed(100)
a = np.array(['Iris-setosa', 'Iris-versicolor', 'Iris-virginica'])
species_out = np.random.choice(a, 150,[0.5, 0.25, 0.25])

print(np.unique(species_out, return_counts=True))

I searched for the answers but I can't find what's the error?

Answer 1

等待大神答复