题解 | #字符串字符匹配#

import sys
def all_chars_in_text(pattern,text):
    pattern_set = set(pattern)
    text_set = set(text)

    return pattern_set.issubset(text_set)
List = []
for line in sys.stdin:
    if line.strip() == "":
        break
    else:
        X = line.strip()
        List.append(X)
pattern = List[0]
text = List[1]

if all_chars_in_text(pattern,text):
    print('true')
else:
    print('false')

利用issubset方法，判断模式串set是否为文本串set的子集