Python Saving and Editing with Klepto

Question

Okay so my question is pretty specific and I apologize in advance. I\'m a new programmer and tried developing on my own from scratch. It was relatively successful only I hav

Answer 1

Basically, you are deleting from the "in-memory" cache, and not from the "file" cache. A klepto archive by default gives you "in-memory" cache, which you use directly through the dict interface, and it also gives you an archive which is the back-end.

Thus, when you dump, you transfer the in-memory items to the back-end. To delete from the cache and from the archive, you have to delete from both.

>>> from klepto.archives import *
>>> arch = file_archive('foo.txt')
>>> arch['a'] = 1
>>> arch['b'] = 2
>>> # look at the "in-memory" copy
>>> arch
file_archive('foo.txt', {'a': 1, 'b': 2}, cached=True)
>>> # look at the "on-disk" copy
>>> arch.archive
file_archive('foo.txt', {}, cached=False)
>>> # dump from memory to the file
>>> arch.dump()
>>> arch.archive
file_archive('foo.txt', {'a': 1, 'b': 2}, cached=False)
>>> arch 
file_archive('foo.txt', {'a': 1, 'b': 2}, cached=True)
>>> # delete from the in-memory cache
>>> arch.pop('a')
1
>>> # delete from the on-disk cache
>>> arch.archive.pop('a')
1
>>> arch
file_archive('foo.txt', {'b': 2}, cached=True)
>>> arch.archive
file_archive('foo.txt', {'b': 2}, cached=False)

I guess I could make it easier to delete from both in a single function call...