import numpy as np
result1 = np.unique([1, 1, 2, 2, 2, 3, 3, 4])
print(type(result1)) # <class 'numpy.ndarray'>
print(result1) # [1 2 3 4]
arr = np.array([[1, 2], [3, 3]])
result2 = np.unique(arr)
print(type(result2)) # <class 'numpy.ndarray'>
print(result2) # [1 2 3]
arr = np.array([[7, 8], [3, 3], [5, 4]])
result3 = np.unique(arr)
print(type(result3)) # <class 'numpy.ndarray'>
print(result3) # [3 4 5 7 8]