Function object from string object: need help with python in playground

Question

Here: https://code.sololearn.com/cWPKlyqZBkcW

I use string with short name of function as atribute of other function (see lines 20-34).
My programm dosn't work :) Here is output:

Traceback (most recent call last):
File "..\Playground\", line 44, in <module>
print (calculate_me(operator, x, y))
File "..\Playground\", line 31, in calculate_me
return func_name(x,y)
TypeError: 'str' object is not callable

I guess, there is a little problem with types of objects here :). Is there way to get function object from string object, or I should use if-else construction instead? Or can I avoid this error any other way?

Answer 1

Change line 30 from:
return func_name(x,y)
to:
return globals()[func_name](x, y)

For a local function:
locals()[func_name](x, y)

If this was in a module (class package) you might be able to use:
getattr(self, func_name)(x, y) # self for the current module otherwise use the name of the imported module or object

You can also change your function name list to:

avail_functions = [
add_me.__name__,
multiply_me.__name__,
substract_me.__name__,
divide_me.__name__,
]
using the __name__ magic method on the the function will return the name of the method as a string.

Answer 2

Thank you very much!
I used "return globals()[func_name](x, y)" instruction and it works!