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Python Check if Methods or interface is implemented before runtime


Force child class to override parent's methodspython 2 code: if python 3 then sys.exit()'Queue' object has no attribute 'size'In Python 3, how to prevent direct creation of a mixin class?Raise exception while defining a class improperlyWhat should I put in the body of an abstract method in PythonOOP code works fine in Python 3.6 but in Python 2.7 throws max recursion depth runtime error__mro__ attribute missing on issubclass check when implementing protocolsWhen does Python check whether a concrete subclass of an ABC implements the required methods?Python. Bound Methods, Mixins & Class DecoratorsAttributeError: module 'asyncio' has no attribute 'coroutine' (Python 3.6.4)






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-1















I'm creating an interface Mixins that contains methods that will throw error if it is not implemented, however it only happens during run time when the method is called, i would like to have python check if method is implemented before run time.



class TestInterface():
def get_testing_name(self):
raise NotImplementedError

def do_something(self):
return self.get_testing_name()


class Testing(TestInterface):
def __init__(self):
super().do_something()


In my Testing class, i didn't defined get_testing_name method, hence it will raise NotImplementedError. However this will only happen on run time



How do i make sure python check if method is not implemented before run time?










share|improve this question



















  • 1





    this may be related: stackoverflow.com/questions/44576167/…

    – hiro protagonist
    Mar 27 at 7:05

















-1















I'm creating an interface Mixins that contains methods that will throw error if it is not implemented, however it only happens during run time when the method is called, i would like to have python check if method is implemented before run time.



class TestInterface():
def get_testing_name(self):
raise NotImplementedError

def do_something(self):
return self.get_testing_name()


class Testing(TestInterface):
def __init__(self):
super().do_something()


In my Testing class, i didn't defined get_testing_name method, hence it will raise NotImplementedError. However this will only happen on run time



How do i make sure python check if method is not implemented before run time?










share|improve this question



















  • 1





    this may be related: stackoverflow.com/questions/44576167/…

    – hiro protagonist
    Mar 27 at 7:05













-1












-1








-1








I'm creating an interface Mixins that contains methods that will throw error if it is not implemented, however it only happens during run time when the method is called, i would like to have python check if method is implemented before run time.



class TestInterface():
def get_testing_name(self):
raise NotImplementedError

def do_something(self):
return self.get_testing_name()


class Testing(TestInterface):
def __init__(self):
super().do_something()


In my Testing class, i didn't defined get_testing_name method, hence it will raise NotImplementedError. However this will only happen on run time



How do i make sure python check if method is not implemented before run time?










share|improve this question














I'm creating an interface Mixins that contains methods that will throw error if it is not implemented, however it only happens during run time when the method is called, i would like to have python check if method is implemented before run time.



class TestInterface():
def get_testing_name(self):
raise NotImplementedError

def do_something(self):
return self.get_testing_name()


class Testing(TestInterface):
def __init__(self):
super().do_something()


In my Testing class, i didn't defined get_testing_name method, hence it will raise NotImplementedError. However this will only happen on run time



How do i make sure python check if method is not implemented before run time?







python-3.x






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Mar 27 at 6:51









nickernicker

791 silver badge11 bronze badges




791 silver badge11 bronze badges










  • 1





    this may be related: stackoverflow.com/questions/44576167/…

    – hiro protagonist
    Mar 27 at 7:05












  • 1





    this may be related: stackoverflow.com/questions/44576167/…

    – hiro protagonist
    Mar 27 at 7:05







1




1





this may be related: stackoverflow.com/questions/44576167/…

– hiro protagonist
Mar 27 at 7:05





this may be related: stackoverflow.com/questions/44576167/…

– hiro protagonist
Mar 27 at 7:05












1 Answer
1






active

oldest

votes


















0














I don't know if I understood you.
Maybe that was what you wanted ?:



try:
t = Testing()
except NotImplementedError:
print("Fail")





share|improve this answer
























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    1 Answer
    1






    active

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    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0














    I don't know if I understood you.
    Maybe that was what you wanted ?:



    try:
    t = Testing()
    except NotImplementedError:
    print("Fail")





    share|improve this answer





























      0














      I don't know if I understood you.
      Maybe that was what you wanted ?:



      try:
      t = Testing()
      except NotImplementedError:
      print("Fail")





      share|improve this answer



























        0












        0








        0







        I don't know if I understood you.
        Maybe that was what you wanted ?:



        try:
        t = Testing()
        except NotImplementedError:
        print("Fail")





        share|improve this answer













        I don't know if I understood you.
        Maybe that was what you wanted ?:



        try:
        t = Testing()
        except NotImplementedError:
        print("Fail")






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 27 at 7:08









        MikeyMikey

        1615 bronze badges




        1615 bronze badges





















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