is there any way to prevent side effects in python?

Question

Is there any way to prevent side effects in python? For example, the following function has a side effect, is there any keyword or any other way to have the python complain abou

Answer 1

Since any Python code can do IO, any Python code could launch intercontinental ballistic missiles (and I'd consider launching ICBMs to be a fairly catastrophic side effect for most purposes).

The only way to avoid side effects is to not use Python code in the first place but rather data - i.e. you end up creating a domain specific language which disallows side effects, and a Python interpreter which executes programs of that language.