sorted 函数bug，有没有大神帮忙指点下这是什么错误

Question

import numpy as np

c = np.loadtxt('data.csv', delimiter = ',', usecols = (6, ), unpack = True)
print ("median =", np.median(c))
sorted = np.msort(c)
print ("sorted =", sorted)

N = len(c)
print("middle =", sorted[(N - 1)/2])
print("average middle =", (sorted[N / 2] + sorted[(N - 1) / 2]) / 2)

print("variance =", np.var(c))
print("variance from definition =", np.mean((c - c.mean()) ** 2))

Answer 1

N/2会被算成小数，你看看用的是不是python3.7。只有2.7会按整数算，后面的都是按浮点数算，应该写成N//2，这样是取整的意思。