python类不接受任何参数

Question

无重复字符的最长字符串问题，我这样写一直报错
class Solution():
def lengthOfLongestSubstring(self,s):
m=str(s)
q=[]
max_1=0
for i in m:
if i not in q:
q.append(i)
print(q)
else:
sum_1=len(q)
q.clear()
q.append(i)
if max_1<sum_1:
max_1=sum_1
print(max_1)
s1=Solution("abcabcab")
si.lengthOfLongestSubstring()
报错：TypeError: Solution() takes no arguments
然后我改成：s1=Solution()
si.lengthOfLongestSubstring("abcabcab")
又报错：NameError: name 'si' is not defined. Did you mean: 's1'?
请问按照这个思路应该怎么改？

Answer 1

s1=Solution()
si.lengthOfLongestSubstring("abcabcab")
一个是s1 一个是si , 这两个不一样，，

又报错：NameError: name 'si' is not defined. Did you mean: 's1'?
这里提示了："si 未 定义， 你是不是想写 s1 "