字符串子串 迴文

求所有迴文子字符串：

mystr="wesafsdsfasdfasdf"
print(12222)

def hwen(str):
    if str[::-1]==str and len(str)>1:
        print("迴文",str)


def sub(str,i):
    for t in range(len(str)-i):
       # print(i+1, str[i:t + i+1] )
        hwen(str[i:t + i+1])

def allSubStr(str):
    for t in range(len(str)):
        sub(str,t)

allSubStr(mystr)