Remove random subset of an array

Good evening, I have an array a = array([ [x1,x2,...,xn], [y1,y2,...,yn]]) so a.shape=(2,n). Is there a quick way to obtain a random subset of this array, i.e. an array of the form r = array([ [xi1,xi2,...,xip], [yi1,yi2,...,yip]]) ?

thank you in advance !