CODEWITHSUNDEEP
pythonpython-exec
Sebastian Alvarez
Sebastian Alvarez

Reputation: 97

How to change __builtins__ module variable?

If you run this code:

src = "import os"
d = dict(__builtins__={})
exec src in d

Python says:

ImportError: __import__ not found

That's what I like to do, but when creating (or maybe loading) a new module:

import imp
mod = imp.new_module("foo")
src = "import os"
exec src in mod.__dict__

As you can see it runs, but I like it doesn't as in the above program. I like to disable all the built-in variables and functions. Is there any way to do this?

If you print mod.__dict__, you can see that it has __builtins__ variable such as any Python module. I think I have to change its value to {}, but I don't know how.

Upvotes: 2

Views: 1402

Answers (1)

Padraic Cunningham
Padraic Cunningham

Reputation: 180441

I think I have to change its value to {}, but I don't know how.

mod.__dict__["__builtins__"] = {}

Upvotes: 2

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