查找字符串出现次数的计数和索引

def count_and_index(search_string, target_string):
    count = 0
    index = []
    start_index = 0
    while True:
        # 在目标字符串中搜索搜索字符串，从上一次的索引位置开始搜索
        found_index = target_string.find(search_string, start_index)
        if found_index == -1:
            break
        else:
            # 更新计数和索引
            count += 1
            index.append(found_index)
            start_index = found_index + len(search_string)
    return count, index

target_string = "This is a sample string to search for occurrences"
search_string = "is"
result_count, result_index = count_and_index(search_string, target_string)
print("Count:", result_count)
print("Index:", result_index)

Count: 2
Index: [2, 5]