hiii,
i just read your task discription and it's just appeals to me very much .
i do not have experience in creating zip but that is super easy to create one but you can easily run python code in zapier for sure ,
i will have a variable input , and then you can trigger code and in code i will write logic and will return the output variable .
ouput variable will be accessible to you from zap.
so you will provide a json in input , i will process it and provide you a desired json output.
this is a super easy task i can give it you in couple of hours provided that you already set up zip , i will only provide python code.
by the way i have 3+ exp as python developement.
Regards
Rohit K