在python中处理二维数组元素索引

array = [[1, 2, 3],
         [4, 5, 6],
         [7, 8, 9]]

element = array[row_index][column_index]

element = array[1][2]

array[row_index][column_index] = new_value

array[0][1] = 10

num_rows = len(array)
num_columns = len(array[0])

for row in array:
    for element in row:
        # 处理每个元素