Say I have a np array
arr = np.array([[1,2,3],
[4,5,6],
[7,8,9],
[1,2,3]])
if i have another numpy array
a = np.array([1,2,3])
How could I find the indexes of arr that matches a
I've tried the following but it returns two arrays
# desired output [0,3]
result = np.where(arr==a)
#results
#(array([0, 0, 0, 3, 3, 3], dtype=int64),
#array([0, 1, 2, 0, 1, 2], dtype=int64))