python - 如何检查 Numpy 数组是否是另一个更大数组的子数组

Question

所以基本上我有两个数组，我想检查一个数组是否在另一个数组中......我正在寻找一种方法来做这样的事情:

>>> arr1 = np.array([1, 0, 0, 1, 1, 0])
>>> arr2 = np.array([0, 0, 1, 1, 1, 0])
>>> test_array = np.array([1, 1, 1])
>>> test_array in arr1
... False
>>> test_array in arr2
... True

有什么办法可以解决这样的问题吗？谢谢。

Answer 1

最直观的方法似乎是像这样的迭代过程:

def isSubset(arr1, arr2): 

    m = len(arr1)
    n = len(arr2)

    for i in range(0, n):
        for j in range(0, m):  
            if arr2[i] == arr1[j] 
                break; 
        """ 
        If the above inner loop was 
        not broken at all then arr2[i] 
        is not present in arr1 
        """
        if j == m:
           return False 
    """
    If we reach here then all 
    elements of arr2 are present 
    in arr1
    """
    return True