Run a dll from python

I'm trying to execute a dll from python.

I found this code

# Importamos ctypes
import ctypes as c

# acceso a la biblioteca
dll = c.CDLL("funciones.dll")

# acceso a la variable global de la biblioteca
# longitud del array
size = c.c_int.in_dll(dll, 'tam').value

# se establece el tipo de dato (en C) que retornará la función
dll.promedio.restype = c.c_float

# de esta forma se declara un array de enteros con ctypes 
vector = c.c_int * size

# se define al array
v = vector(10,20,13,14,5,16)

When I run the program, it tells me:

OsError [WinError 193] %1 no es una aplicación WIN32 válida.

I was looking in the forums and indicated that the problem may be that I'm trying to run a 32-bit dll in 64 python.

So, since I was using Python 64, I switched to 32-bit python and it does not work either.

Now. The strangest thing is that if I execute the python interpreter and I am executing instruction by instruction, the program works and does not mark error; it only does it when the .py file.

Will anyone know anything about it?

Greetings!