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Questions tagged [shelve]

Shelve can refer to either a Python object persistence or a pending change in a Visual Studio Workspace

A shelf in Python is a persistent, dictionary-like object. Documentation: shelve

Shelve can also refer to a pending change in the workspace within Visual Studio 2005

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How to implement a Python virtual filesystem using shelve

I have set up a Python script that simulates an OS. It has a command prompt and a virtual file system. I am using the shelve module to simulate the file system, being multi-dimensional in order to support a hierarchy of directories. However, I am…
elijaheac
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Is "shelve" just a combination of "dbm" and "pickle"?

So everything that is done in shelve can be done separately with dbm and pickle?
NoName
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Python `shelve` read-only mode is not working

Is shelve read only mode broken? The documentation says the flag parameter works as stated in dbm.open so I thought if I opened in read mode I shouldn't be able to change the shelve object. The page here also seems to suggest that modifying a…
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python shelve dbm.error?

I'm trying to add a dict of dicts to a shelve file: >>> d = shelve.open('index.shelve') >>> d >>> print(list(d.keys())) [] >>> d['index'] = index Traceback (most recent call last): File "", line…
mathtick
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Python shelve having items that aren't listed

I've been saving a bunch of dictionaries to file using Python's shelve module (with Python 3.4 on OSX 10.9.5). Each key is a string of an int (e.g., "84554"), and each value is a dictionary of dictionaries of a few smallish strings. No keys are…
Zeke
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shelve raises EOFError after a few iterations of pickle/unpickle

I'm using the shelve module to save some data. The values of the keys of my shelve object are set objects. Pickling snippet: import shelve other_links = { 'Blue Estate The Game, 72':…
Berman
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shelve library limitation on objects in python

I have been using shelve to store a ton of objects in this manner: dictionary with strings as the key and a list as the value: i.e. data["MITL"] = ["Radio And Television Broadcasting And Communications Equipment", "Communication Equipment"] or more…
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Really weird issue with shelve (python)

I create a file called foo_module.py containing the following code: import shelve, whichdb, os from foo_package.g import g g.shelf = shelve.open("foo_path") g.shelf.close() print whichdb.whichdb("foo_path") # =>…
Jesse Aldridge
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How can I force python to use dumbdbm module to create a new database?

The shelve module is implemented on top of the anydbm module. This module acts as a façade for 4 different specific DBM implementations, and it will pick the first module available when creating a new database, in the following…
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Any way to use a tuple as key in a shelf? (Python)

I want to use a tuple (1,2,3) as a key using the shelve module in Python. I can do this with dictionaries: d = {} d[(1,2,3)] = 4 But if i try it with shelve: s = shelve.open('myshelf') s[(1,2,3)] = 4 I get: "TypeError: String or Integer object…
anon_y_mouse
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seeing changes in shelve in TFS2010

I am using TFS 2010. I have to review code which is shelved by other developer before checkin. How can we do this in TFS2010 so that I can get his changes and review. Thanks!
venkysmarty
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Easiest way to add a function to existing class

I'm using the python's built-in shelve module to manage some simple dictionaries. The problem I'm having is I want to use with shelve.open(filename) as f:, but when I try it claims DbfilenameShelf has no attribute __exit__. So, I'm guessing the…
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How to convert a shelve object into a dictionary object in Python

I have a persistent dictionary created with DB = shelve.open('Database') This object is of type: class 'shelve.DbfilenameShelf' However, I want to know if it is possible to convert it back into a dictionary: class 'dict' PS: I know I can just…
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How to use dill library for object serialization with shelve library

I'm using PyMemoize library to cache coroutine. I decorated the coroutine, but when Python calls it, I get: TypeError: can't pickle coroutine objects This happens because PyMemoize internally tries to pickle coroutine and store it inside Redis. For…
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Why is a Python shelf file containing very little data so large on macOS?

I was just following along an example given in a book to illustrate the Python shelve module on macOS High Sierra. As shown below only two small tuples of short strings get stored in a shelf. And as you can see in the very last line, the resulting…
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