字符串的所有字符都属于一个集合吗？

Question

是否有一种直接的方法来查找字符串的所有字符是否属于给定的字符集？我有以下循环代码,我觉得可以缩短:

def allInSet(mystr, myset):
    result = True
    for char in mystr:
        result &= (char in myset)
    return result

例子:

>>> allInSet("yyyow", set(['a','e','i','o','u','w','y']))
True
>>> allInSet("yowza", set(['a','e','i','o','u','w','y']))
False

还有,list(mystr) in set(['a','b','c'])没用.

Answer 1

>>> set("aeiou").issuperset("hello world")
False
>>> set("aeiou").issuperset("eoo")
True