How do I execute string python will be input by the users via web application

Question

We have a webApplication(.net) and calcuationengine (Python)

1. WebApplication: to show results and Python Formula to users/and write python Input Formulas
2. calcuationengine : Calculate Formulas

The target solution is :Web application send a json file with code to be evaluated (or executed).

Can you give a option about Exec/eval

exemple formula

def calcul_Inf_monthly_rates(Input) :    
    try :
        output=np.array([(1+v)**(1/12)-1 for v in Input])
    except:
        logging.error("Inf_monthly_rates : Error Calcul")
        output=[]
    finally:
        return output

Answer 1

Let's say your json looks like:

json_func = """{"func": len}"""
# I used a simple len function for example

You can use evel in the following way:

executed_func = eval(json_func)["func"]
# now you can run executed_func with params

print(executed_func("Hello")) # will output: 5