get ast from python object in interpreter

问题

I am building an application for which I would like a naive user to define a simple function. I would then like to take this function and convert it into an abstract syntax tree. This should also work during an interactive session (i.e using the interpreter). Here's what I have tried so far in the interpreter:

• dill.source.getsource method
• inspect.getsourcemethod
• accessing the function object's __code__ attribute

The first two methods are problematic since they need for the function object to be written in a physical file somewhere in the system. The third one only gave me a byte code version of the code, not useable in ast.parse method.

I am also open to converting a python object directly to abstract syntax but this seems to go against how ast's are supposed to work.

I really need to be able to get an ast from my python object in a regular (not ipython) interpreter. How can I do this?

EDIT

Heres how my "naive user" would interact with my custom library through the interpreter:

>>> import MyLib
>>> def f(x): return x**2
>>> f = MyLib.FunctionAST(f) #FunctionAST will handld the conversion to abstract syntax

来源：https://stackoverflow.com/questions/60797338/get-ast-from-python-object-in-interpreter