test_exec_ast.py

import ast
import inspect
import sys

def create_func_from_ast(targ, arg_globals=globals()):
    source = "def __target_func__(*args, **kw): return True\n"
    func_ast = ast.parse(source)
    func_ast.body[0].body[0].value = targ
    func_ast = ast.fix_missing_locations(func_ast)
    code = compile(func_ast, '<string>', 'exec')
    locals = {}
    eval(code, arg_globals, locals)
    return locals['__target_func__']

def eval_ast(targ, arg_globals=globals(), arg_locals=locals()):
    if not isinstance(targ, ast.Expression):
        targ = ast.Expression(targ)
    targ = ast.fix_missing_locations(targ)
    code = compile(targ, '<string>', 'eval')
    return eval(code, arg_globals, arg_locals)

class Test():
    def __init__(self):
        print("created Class Test")
    
t = ast.Call(func=ast.Name(id='Test', ctx=ast.Load()), args=[], keywords=[],
             starargs=None, kwargs=None)
func = create_func_from_ast( t )
a = func()
print(a)

b = eval_ast(t)
print(b)

c = 10
t = ast.BinOp(ast.Name('c', ast.Load()), ast.Add(), ast.Num(2))
print( eval_ast(t) )