如何在字符串中搜索多个子字符串

def search_multiple_substrings(string, substrings):
    found_substrings = set()  # 使用集合存储找到的子字符串，避免重复

    for substring in substrings:
        if string.find(substring) != -1:
            found_substrings.add(substring)

    return found_substrings

# 示例用法
string = "This is a sample string"
substrings = ["is", "sample", "not", "string"]

found_substrings = search_multiple_substrings(string, substrings)
print(found_substrings)

{'is', 'sample', 'string'}