How to define specific function parameter variables from string?

Question

I'm receiving JSON objects of arbitrary shape. And reform them into Lists mapped using __code__.co_varnames[:argc] Ending up with a List looking like this ["param1=hello", "param2=world"] in any order. Now I want to link them to the specific parameters in the function as below. But can't find how. In bash we have eval() I read something about using exec() but don't know how that should work.

def foo(param1:str, param2:str, *args) -> str:
    return param1 + param2

list1 = ["param1=hello", "param2=world" ]
list2 = ["param2=world", "param1=hello" ]

# Want to do something like this for both lists
print(foo(*list1))
print(foo(*list2))

What exactly are you trying to accomplish? None of what you describe should require messing with __code__ or eval. Can you post an example of your JSON and your intended output? — tzaman
– tzaman, Commented Mar 11, 2021 at 16:55

Tomerikoo · Accepted Answer · 2021-03-11 17:08:01Z

2

You can pass the function a kwargs dict of the form {"param1": "hello", "param2": "world"}. To achieve this, simply split() the strings with =:

kwargs = dict(s.split('=') for s in list1)
print(kwargs, foo(**kwargs))

Will give

{'param1': 'hello', 'param2': 'world'} helloworld

edited Mar 11, 2021 at 17:08

answered Mar 11, 2021 at 16:58

Tomerikoo

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