Numpy根据Bool值挑选数组中元素

import numpy as np
i_=[2]  # 挑选第三行数据
pop=np.arange(12).reshape(3,4)
print("pop(3,4)\n",pop)
bool=np.array([0,0,1,1]).astype("bool") # [False,False,True,True]
# 使用数组作为索引选择个体
pop_i_=pop[i_]
print("pop_i_\n",pop_i_)
#选择个体中选定的位置
pop_select=pop[i_,bool]
print("pop_select\n",pop_select)

# pop(3,4)
#  [[ 0  1  2  3]
#  [ 4  5  6  7]
#  [ 8  9 10 11]]
# pop_i_
#  [[ 8  9 10 11]]
# pop_select
#  [10 11]