Question

let’s assume following C code:

// events.h
enum Events  {eOne, eTwo, eThree};
enum Events getEvent(void);

…

//ctrl.c
#include "events.h"

void ctrl(void)
{
    switch(getEvent()) 
    {
    case eOne:
        // ...
        break;
    case eTwo:
        // ...
        break;
    case eThree:
        // ...
        break;
    default:
        ;
    }
}

What is pythonic way to implement this? The simple way for me, is to use strings instead of enums, but how can I be sure that all strings are typed correctly (i.e. are the same in all files)?

Answer 1

The following Python code is similar to how your C code interacts. To use variables from another module you need to first import that module.

// events.py
class Events:
    eOne, eTwo, eThree = range(3)

def getEvent():
    # add code for getEvent here (might have been in events.c for C code)
    return some_event

…

// ctrl.py
from events import Events, getEvent
def ctrl():
    event = getEvent()
    if event == Events.eOne:
        # ...
    elif event == Events.eTwo:
        # ...
    elif event == Events.eThree:
        # ...
    else:
        # default