Консервация файла (pickle)

name = input("Ваше имя:  ")
score = 4
import pickle
a = (name, score)
file = open("list.dat", "ab")
pickle.dump(a, file)
file.close()
 
file = open("list.dat", "rb")
spisok = pickle.load(file)
print(spisok)
file.close()

>>> name = input("your name: ")
your name: jabbson
>>> name
'jabbson'
>>> score = 4
>>> import pickle
>>> f = open('list.dat', 'ab')
>>> pickle.dump((name, score), f)
>>> pickle.dump((name, score+1), f)
>>> f.close()
>>>
>>>
>>> f = open('list.dat', 'rb')
>>>
>>> pickle.load(f)
('jabbson', 4)
>>> pickle.load(f)
('jabbson', 5)
>>> pickle.load(f)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
EOFError: Ran out of input
>>>
>>> f.close()

name = input("AAA  ")
score = 6
import pickle
spisok = [name, score]
file = open("list.dat", "ab")
pickle.dump(spisok, file)
file.close()
 
spisok = []
with open("list.dat", "rb") as file:
    while True:
        try:
            spisok.append(pickle.load(file))
        except EOFError:
            break
print(spisok)

name = input("AAA  ")
score = 6
cort = (name, score)
import pickle
spisok = []
spisok.append(cort)
file = open("list.dat", "ab")  
pickle.dump(spisok, file) # Запись в файл
file.close()
 
file = open("list.dat", "rb") 
new = pickle.load(file) # Чтение из файла
print(len(new))
for i in range(len(new)):
    print(new[i])
file.close()

import pickle
 
name = input('Введите имя: ')
score = 6
data = [(name, score), ('some value', 'some value')]
with open("list.dat", "wb") as out:
    pickle.dump(data, out)
 
 
with open("list.dat", "rb") as inp:
    from_file = pickle.load(inp)
    
print(len(from_file))
for i in from_file:
    print(i)