import error between 2 modules

[Maric Michaud]

Le Wednesday 27 August 2008 12:38:33 jimgardener, vous avez écrit :
> empmodule.py
> ----------
> from workmodule import Worker
>
> class Employer:
>     def __init__(self,n):
>         self.name=n
>         self.worker=Worker()
>     def getemployerName(self):
>         return self.name
>     def callWorker(self,message):
>         self.worker.answerCall(message)
> if __name__ == "__main__":
>     emp=Employer()
>     emp.callWorker("report to work")
>
>
> workmodule.py
> ------------------
> from empmodule import Employer
> class Worker:
>     def __init__(self):
>         self.emp=Employer()
>     def answerCall(self,msg):
>         print "Worker :"+msg+" received
> from :"+self.emp.getemployerName()

For this case you could do your import directly in the __init__ func and watch 
the infinite loop you did in action !

empmodule.py
----------
from workmodule import Worker

class Employer:
    def __init__(self,n):
        self.name=n
        self.worker=Worker(self)
    def getemployerName(self):
        return self.name
    def callWorker(self,message):
        self.worker.answerCall(message)
if __name__ == "__main__":
    emp=Employer()
    emp.callWorker("report to work")


workmodule.py
------------------
class Worker:
    def __init__(self, employer):
        from empmodule import Employer
        if not isinstance(employer, Employer):
            raise ValueError("Not an employer")
        self.emp=employer()

-- 
_____________

Maric Michaud