如何解决错误“在python中没有名为stastics的模块”？

Question

我已经尝试过该程序，但出现错误，没有属性错误？

import statistics

data = [11, 21, 11, 19, 46, 21, 19, 29, 21, 18, 3, 11, 11]

x = statistics.mean(data)
print(x)

y = statistics.median(data)
print(y)

z = statistics.mode(data)
print(z)