将字符串转换为集合，以便与另一个集合进行比较

# 字符串转换为集合
def string_to_set(string, delimiter):
    elements = string.split(delimiter)
    return set(elements)

# 示例字符串
string1 = "apple,banana,orange"
string2 = "banana,grape,kiwi"

# 转换为集合
set1 = string_to_set(string1, ",")
set2 = string_to_set(string2, ",")

# 求交集
intersection = set1.intersection(set2)
print("交集:", intersection)

# 求并集
union = set1.union(set2)
print("并集:", union)

# 求差集
difference = set1.difference(set2)
print("差集:", difference)