Matrix contains builtin

I’d like a “is contiguous sublist/submatrix” builtin. Maybe Þc?

[ghost]

def matrix_contains(lhs, rhs):
    for i in range(len(lhs)):
        for j in range(len(lhs[0])):
            flag = True
            try:
                for k in range(len(rhs)):
                    for l in range(len(rhs[0])):
                        flag = flag and (lhs[i+k][j+l] == rhs[k][l])
            except:
                continue
            if flag == True:
                return flag
    return False

matrix_contains([[1,2,3],[3,4,6]], [[1,2],[3,4]]) -> True

[cgccuser]

@Coder-94 That matrix_contains function is a good start, we could add just that for now and work on generalizing to n dimensions later, because it’d probably be hard. Do you want to make a PR for a Matrix Contains builtin?