python 3.x - Python3 Shelve: how to append a value permanently? -


i want users append new values in shelve module. everytime close file, appended values disappear.

import shelve   shelvepracticefile = shelve.open('/shelvepractice', writeback=true)  shelvepracticefile['funnynames'] = ['lala', 'dada', 'mama', 'baba'] shelvepracticefile['funnynumbers'] = [3,9,18] shelvepracticefile['funnyskills'] = ['python', 'football', 'gaming']  # try append.  print('lets try append. type in something') myinput = input()  shelvepracticefile['funnyskills'].append(myinput)  # lets read , print shelve file we've created!  print(shelvepracticefile['funnynames']) print(shelvepracticefile['funnynumbers']) print(shelvepracticefile['funnyskills'])   shelvepracticefile.close()

this code works , saves shelve. beginners me; if keep running code above on , over, shelvepracticefile['funnyskills'] = ['python', 'football', 'gaming'] part rewrite dictionary , remove value have appended.

i hope helps other people doing same mistake :)


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