python - Inheritance and classes -

this in class file.

class edifice:     def __init__(self,storeys,area):         self.__storeys = storeys         self.__area = area      def show_info(self):         print('storeys:',self.__storeys,', floor area:',self.__area)  class home(edifice):     def __init__(self, storeys, area, bedrooms):         super().__init__(storeys, area)         self.__bedrooms = bedrooms      def show_info(self):         super(home, self).show_info()         print("for human habitation: ", self.__bedrooms, "bedrooms") 

this in executable file:

from classes import edifice, home  def main():     print("home")     h = home(2,3000,3)     h.show_info()  main() 

from executable file need create instance of home show_info() method different text output.

you want use like:

class home(edifice):     def __init__(self, storeys, area, bedrooms):         super().__init__(storeys, area)         self.__bedrooms = bedrooms         super(home, self).show_info()         print("for human habitation: ", bedrooms, "bedrooms")  h = home(2,3000,3) storeys: 2 , floor area: 3000 human habitation:  3 bedrooms 

to override method pretty simple again using super call parent's method:

class home(edifice):     def __init__(self, storeys, area, bedrooms):         super().__init__(storeys, area)         self.__bedrooms = bedrooms      def show_info(self):         super(home, self).show_info()         print("for human habitation: ", self.__bedrooms, "bedrooms")  h = home(2,3000,3) h.show_info() storeys: 2 , floor area: 3000 human habitation:  3 bedrooms 

in case using python2 syntax different, should inherit object support new style classes:

class edifice(object):     def __init__(self,storeys,area):         self.__storeys = storeys         self.__area = area      def show_info(self):         print('storeys:{}, floor area: {}'.format(self.__storeys,self.__area))  class home(edifice):     def __init__(self, storeys, area, bedrooms):         super(home, self).__init__(storeys, area)         self.__bedrooms = bedrooms      def show_info(self):         super(home, self).show_info()         print("for human habitation: {} bedrooms.".format(self.__bedrooms)  h = home(2,3000,3) h.show_info() 

not sure mean executable file can use if __name__==__main__ in file , code executed if run file:

if __name__=="__main__":     h = home(3,3000,2)     h.show_info() 

if want import , run code in .py file:

from whatever import home h = home(3,3000,2) h.show_info() 

the whatever module have in same directory or in pythonpath, there few different methods of adding path discussed in question.

for edit, make message attribute , change second instance:

class home(edifice):     def __init__(self, storeys, area, bedrooms):         super().__init__(storeys, area)         self.__bedrooms = bedrooms         self.message = "for human habitation: {} bedrooms"      def show_info(self):         super(home, self).show_info()         print("{}".format(self.message.format(self.__bedrooms))) 

then:

from module import home   h = home(3, 3000, 2) h.show_info()  h2 = home(2, 4000, 5) h2.message = "second human habitation: {} bedrooms"  h2.show_info() 

output:

storeys: 3 , floor area: 3000 human habitation: 2 bedrooms storeys: 2 , floor area: 4000 second human habitation: 5 bedrooms 

without mangling simpler:

class home(edifice):     def __init__(self, storeys, area, bedrooms):         super().__init__(storeys, area)         self.bedrooms = bedrooms         self.message = "for human habitation: {} bedrooms".format(self.bedrooms)      def show_info(self):         super(home, self).show_info()         print(self.message) 

we set whole message instance:

from module import home   h = home(3, 3000, 2) h.show_info()  h2 = home(2, 4000, 5) h2.message = "second human habitation: {} bedrooms".format(h2.bedrooms)  h2.show_info()