import numpy as np
arr = np.array([1, 2, 1, 2, 3, 4, 5, 4, 6, 7])
arr = np.unique(arr)
print(arr)
arr1 = np.array([1, 2, 3, 4])
arr2 = np.array([3, 4, 5, 6])
arr = np.union1d(arr1, arr2)
print(arr)
arr1 = np.array([1, 2, 3, 4])
arr2 = np.array([3, 4, 5, 6])
arr = np.intersect1d(arr1, arr2, assume_unique=True)
print(arr)
arr1 = np.array([1, 2, 3, 4])
arr2 = np.array([3, 4, 5, 6])
arr = np.setdiff1d(arr1, arr2, assume_unique=True)
print(arr)
arr1 = np.array([1, 2, 3, 4])
arr2 = np.array([3, 4, 5, 6])
arr = np.setxor1d(arr1, arr2, assume_unique=True)
print(arr)