Python reorders the array (or matrix) (and the index ensures that it is different)

First of all, we need to know a property ：pandas Of dataframe or numpy Of array、matrix, You can go straight through Index list （ heavy ） Sort .
For example, three-dimensional array Array ：A,A.shape=(x,y,z). be A[index list ] The rearrangement is x The order of the elements . Empathy B.shape=(n,x,y,z), be B[index list ] The rearrangement is n The order of the elements .
Here is a one-dimensional test ：
Be careful ： Use random.sample To ensure that the generated index number Different .np.random It doesn't seem to have this function .