import numpy as np

data = np.mat([[1, 200, 105, 3, False], [2, 165, 80, 2, False],
              [3, 184.5, 120, 2, False], [4, 116, 70.8, 1, False], [5, 270, 150, 4, True]])
coll=[]
for row in data:
    print(row)
    coll.append(row[0,1])

print(coll)
print('--------------')
print(np.sum(coll))  #数据求和
print(np.mean(coll)) #数据求平均
print(np.std(coll))  #数据求标准差
print(np.var(coll))  #数据求方差