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
– ShadowRanger, Commented Mar 18, 2017 at 5:39

Ignacio Vazquez-Abrams · Accepted Answer · 2017-03-18 05:36:11Z

5

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

answered Mar 18, 2017 at 5:36

Ignacio Vazquez-Abrams

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2 Comments

leopoodle Over a year ago

my question is how can i add that support to my class?

Ignacio Vazquez-Abrams Over a year ago

You cannot. ast.literal_eval() chooses what it accepts.

Irmen de Jong · Accepted Answer · 2017-03-18 12:45:49Z

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.

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