How to make python class "ast.literal_eval()" compatible?

Question

I have my custom class that represents an object. I want to make that object compatible with "ast.literal_eval()"

How can I do that? I can add necessary method/code to my class if necessary.

`ast.literal_eval` evaluates literals. Python does not support user defined literals. Ergo, you can't use `ast.literal_eval` to produce a user defined type. If you could, all the security guarantees of `ast.literal_eval` would go out the window. — ShadowRanger, Mar 18 '17 at 05:39

score 4 · Answer 1 · answered Mar 18 '17 at 05:36

4

You cannot. You will need to reimplement it from scratch, adding support for your class within it.

answered Mar 18 '17 at 05:36

Ignacio Vazquez-Abrams

776,304
153
1,341
1,358

my question is how can i add that support to my class? – leopoodle Mar 18 '17 at 05:36
1

You cannot. `ast.literal_eval()` chooses what it accepts. – Ignacio Vazquez-Abrams Mar 18 '17 at 05:37

score 1 · Answer 2 · answered Mar 18 '17 at 12:45

1

Because you tagged your question with Pyro, I assume you're asking it in the context of serializing your own classes when using Pyro's remote method calls. Pyro provides a mechanism to do that.

answered Mar 18 '17 at 12:45

Irmen de Jong

2,739
1
14
26

How to make python class "ast.literal_eval()" compatible?

2 Answers2