>>> import datetime
>>> 
>>> class String:
...     
...     def __init__(self, seq, maxsize=10):
...         self.seq = list(seq)
...         self.seq.insert(0, len(self.seq))
...         self.maxsize = maxsize
...         self.created = datetime.datetime.now()
...     
...     def __str__(self):
...         return (
...             str(self.seq)
...             + ' max ' + str(self.maxsize)
...             + ' created ' + str(self.created)
...         )
...     
...     __repr__ = __str__
... 
>>> 
>>> s1 = String('abc')
>>> s1
[3, 'a', 'b', 'c'] max 10 created 2021-02-03 12:35:10.865794
>>> 
>>> s2 = String('abcdef')
>>> s2
[6, 'a', 'b', 'c', 'd', 'e', 'f'] max 10 created 2021-02-03 12:35:20.355043
>>>

 import datetime
class String:
    
    def __init__(self, seq, maxsize=10):
        self.seq = list(seq)
        self.seq.insert(0, len(self.seq))
        self.maxsize = maxsize
        self.created = datetime.datetime.now()
        self.insert = self.seq.insert(1, 'n')
    def __str__(self):
        return ('Измененная строка:' + str(self.insert)
            + str(self.seq)
            + ' Максимальная длина: ' + str(self.maxsize)
            + ' Время создания строки: ' + str(self.created)
        )
    __repr__ = __str__
s1 = String('abc')
print(s1)
s2 = String('abcdef')
print(s2)
s3 = String('abcdefgh')
print(s3)