在python中查找字符串的字谜

问题描述

我为anagrams写了代码，但它没有给出一些测试用例的结果

import itertools
def find_all_anagrams(words, word):
        if word is None:
            return []
        else:
            m = set()
            for permutation in itertools.permutations(word.lower()):
                m.add("".join(permutation))
            ls = []
            for anagram in m:
                ls.append(anagram)
            n = [i for i in words if i in ls]
            return n
        pass

assert ["not", "ton"] == find_all_anagrams(["ant", "not", "ton"], "ont")
assert ["ant", "tan"] == find_all_anagrams(["ant", "not", "ton", "tan"], "tan")
assert [] == find_all_anagrams(["ant", "not", "ton", "tan"], "abc")
assert [] == find_all_anagrams(["ant", "not", "ton", "tan"], None)
assert [] == find_all_anagrams(None, None)
assert ["ant", "tan"] == find_all_anagrams(["ant", "not", "ton", "tan"], "TAN")

但对于这个测试用例，它给出了一个空列表

assert ["Ant", "Tan"] == find_all_anagrams(["Ant", "not", "ton", "Tan"], "TAN")

检查我的代码