python - Is there anyway to select and save any part of array? -

ı want select anypart of list , save while programming

so ı m looking command f.save[i:j] ;

f = open ("text.txt","w") f.write("123456789")  **thats 9 bit , ı wanna selec between second , fifth bit **  = f.save[2:5]  

something

you can use pickle, serializes array (and other python objects) , saves file. loads file , deserializes contents, giving off dictionary. read docs. can use 1 of it's implementations, i.e. shelve or persistent dict, supports json , other formats instead of pickle.

you can use database sqlite or plain text file , use own implementation.

i tried pickle not working me

what not working? please give more thought question. try using shelve:

>>> import shelve >>> = [1, 2, 3, 4, 5, 6, 7, 8, 9] >>> db = shelve.open('/path/to/my/database/file.db', writeback=true) # notice file must exist >>> db['a'] = a[2:5] >>> db.close() >>> quit() # new interpreter opened >>> import shelve >>> db = shelve.open('/path/to/my/database/file.db', writeback=true) >>> db['a'] [3, 4, 5]