Numpy在数组形式中给定的索引处获取值

import numpy as np

# 创建一个一维数组
arr_1d = np.array([10, 20, 30, 40, 50])

# 获取索引为2的值
value_at_index_2 = arr_1d[2]
print(f"Value at index 2 in 1D array: {value_at_index_2}")

# 创建一个二维数组
arr_2d = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])

# 获取索引为(1, 2)的值
value_at_index_1_2 = arr_2d[1, 2]
print(f"Value at index (1, 2) in 2D array: {value_at_index_1_2}")

Value at index 2 in 1D array: 30
Value at index (1, 2) in 2D array: 6

try:
    # 尝试访问不存在的索引
    invalid_value = arr_1d[10]
except IndexError as e:
    print(f"Error: {e}")

try:
    # 错误的索引类型
    wrong_index_value = arr_2d[1, 2, 3]
except IndexError as e:
    print(f"Error: {e}")