怎么在Python中合并数组

要在Python中合并数组，可以使用以下几种方法：

1. 使用"+"操作符合并两个数组：

arr1 = [1, 2, 3] arr2 = [4, 5, 6] combined_arr = arr1 + arr2 print(combined_arr) # 输出：[1, 2, 3, 4, 5, 6] 

2. 使用extend()方法合并两个数组：

arr1 = [1, 2, 3] arr2 = [4, 5, 6] arr1.extend(arr2) print(arr1) # 输出：[1, 2, 3, 4, 5, 6] 

3. 使用extend()方法合并多个数组：

arr1 = [1, 2, 3] arr2 = [4, 5, 6] arr3 = [7, 8, 9] arr1.extend(arr2 + arr3) print(arr1) # 输出：[1, 2, 3, 4, 5, 6, 7, 8, 9] 

4. 使用列表解析合并多个数组：

arr1 = [1, 2, 3] arr2 = [4, 5, 6] arr3 = [7, 8, 9] combined_arr = [x for arr in [arr1, arr2, arr3] for x in arr] print(combined_arr) # 输出：[1, 2, 3, 4, 5, 6, 7, 8, 9]