提取一个子数组

def extract_subarray(arr, start_index, end_index):
    """
    提取子数组的函数
    :param arr: 原始数组
    :param start_index: 起始索引（包含）
    :param end_index: 结束索引（不包含）
    :return: 子数组
    """
    return arr[start_index:end_index]

# 示例用法
original_array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
subarray = extract_subarray(original_array, 2, 7)
print(subarray)  # 输出: [2, 3, 4, 5, 6]

def safe_extract_subarray(arr, start_index, end_index):
    if start_index < 0 or end_index > len(arr) or start_index >= end_index:
        raise ValueError("索引越界或不合法")
    return arr[start_index:end_index]

def lazy_extract_subarray(arr, start_index, end_index):
    for i in range(start_index, end_index):
        yield arr[i]

# 示例用法
for element in lazy_extract_subarray(original_array, 2, 7):
    print(element)  # 输出: 2 3 4 5 6