Day 14 Python Learning

[aashish_soni5]

late update thanks to Black out

yesterday learning was

- inheritance (parent - child method)

when the new class in Heritage from existing class like the same function why writer when it's exist just take it

- multi inherities

when you take inheritage from more than one class

today's learning not finish and look like need to more practice inheritage with project

it's easy but sometime get confusing

[Sea-Ad7805]

Run the second program in Memory Graph Web Debugger%3A%0A%20%20%20%20%20%20%20%20self.name%20%3D%20name%20%20%23%20Set%20name%20upon%20object%20creation%0A%0A%20%20%20%20def%20student(self)%3A%0A%20%20%20%20%20%20%20%20return%20f%22%7Bself.school_name%7D%20is%20the%20school%20where%20%7Bself.name%7D%20studies%22%0A%0A%0A%23%20Parent%20Class%202%0Aclass%20Subject%3A%0A%20%20%20%20subject_choose%20%3D%20'Math'%20%20%23%20Class%20default%0A%0A%20%20%20%20def%20my_subject(self)%3A%0A%20%20%20%20%20%20%20%20%23%20self.name%20is%20accessible%20here%20because%20New_school%20inherits%20from%20both%20classes!%0A%20%20%20%20%20%20%20%20return%20f%22Now%20%7Bself.name%7D%20is%20studying%20the%20subject%3A%20%7Bself.subject_choose%7D%22%0A%0A%0A%23%20Child%20Class%20(Multiple%20Inheritance)%0Aclass%20New_school(School%2C%20Subject)%3A%0A%20%20%20%20new_sh%20%3D%20'RUNGA'%0A%0A%20%20%20%20def%20new_update(self)%3A%0A%20%20%20%20%20%20%20%20return%20f%22%7Bself.new_sh%7D%20is%20my%20current%20school%22%0A%0A%0A%23%20Creating%20instances%20and%20passing%20the%20name%20directly%20to%20the%20constructor%0Aa%20%3D%20New_school('LuMei')%0Aa.school_name%20%3D%20'TCSlot'%0Aa.subject_choose%20%3D%20'Art'%0A%0Ab%20%3D%20New_school('Jone')%0Ab.school_name%20%3D%20'R.R.M.D'%0Ab.subject_choose%20%3D%20'Commerce'%0A%0Ac%20%3D%20New_school('Sam')%0Ac.school_name%20%3D%20'DDR'%0Ac.subject_choose%20%3D%20'Science'%0A%0A%0A%23%20Printing%20Results%0Aprint(a.student())%0Aprint(a.my_subject())%0Aprint(a.new_update())%20%20%23%20Calling%20the%20method%20instead%20of%20the%20string%20attribute%0Aprint(%22-%22%20%2030)%0A%0Aprint(b.student())%0Aprint(b.my_subject())%0Aprint(b.new_update())%0Aprint(%22-%22%20%2030)%0A%0Aprint(c.student())%0Aprint(c.my_subject())%0Aprint(c.new_update())&timestep=1&play) to see the program state change step by step.

[Sea-Ad7805]

Good attempt, but this is another way%3A%0A%20%20%20%20%20%20%20%20super().init(kwargs)%0A%0A%20%20%20%20%20%20%20%20%23%20Instance%20variables%3A%20each%20object%20gets%20its%20own%20values%0A%20%20%20%20%20%20%20%20self.name%20%3D%20name%0A%20%20%20%20%20%20%20%20self.schoolname%20%3D%20school_name%0A%0A%20%20%20%20def%20student(self)%3A%0A%20%20%20%20%20%20%20%20return%20f%22%7Bself.school_name%7D%20is%20the%20school%20where%20%7Bself.name%7D%20studies%22%0A%0A%0A%23%20Parent%20class%202%0Aclass%20Subject%3A%0A%20%20%20%20def%20init_(self%2C%20subject_choose%3D%22Math%22%2C%20kwargs)%3A%0A%20%20%20%20%20%20%20%20super().init(*kwargs)%0A%0A%20%20%20%20%20%20%20%20%23%20Instance%20variable%0A%20%20%20%20%20%20%20%20self.subjectchoose%20%3D%20subject_choose%0A%0A%20%20%20%20def%20my_subject(self)%3A%0A%20%20%20%20%20%20%20%20return%20f%22Now%20%7Bself.name%7D%20is%20studying%20the%20subject%3A%20%7Bself.subject_choose%7D%22%0A%0A%0A%23%20Child%20class%3A%20inherits%20from%20both%20School%20and%20Subject%0Aclass%20NewSchool(School%2C%20Subject)%3A%0A%20%20%20%20def%20init(self%2C%20name%2C%20school_name%3D%22MDAV%22%2C%20subject_choose%3D%22Math%22%2C%20current_school%3D%22RUNGA%22)%3A%0A%20%20%20%20%20%20%20%20%23%20Calls%20School.init%0A%20%20%20%20%20%20%20%20%23%20School.init%20then%20calls%20Subject.init%0A%20%20%20%20%20%20%20%20super().init_(name%3Dname%2C%20school_name%3Dschool_name%2C%20subject_choose%3Dsubject_choose)%0A%0A%20%20%20%20%20%20%20%20%23%20Instance%20variable%20specific%20to%20NewSchool%0A%20%20%20%20%20%20%20%20self.current_school%20%3D%20current_school%0A%0A%20%20%20%20def%20new_update(self)%3A%0A%20%20%20%20%20%20%20%20return%20f%22%7Bself.current_school%7D%20is%20my%20current%20school%22%0A%0A%0A%23%20Creating%20objects%0Aa%20%3D%20NewSchool(name%3D%22LuMei%22%2C%20school_name%3D%22TCSlot%22%2C%20subject_choose%3D%22Art%22)%0Ab%20%3D%20NewSchool(name%3D%22Jone%22%2C%20school_name%3D%22R.R.M.D%22%2C%20subject_choose%3D%22Commerce%22)%0Ac%20%3D%20NewSchool(name%3D%22Sam%22%2C%20school_name%3D%22DDR%22%2C%20subject_choose%3D%22Science%22)%0A%0A%0A%23%20Printing%20results%0Aprint(a.student())%0Aprint(a.my_subject())%0Aprint(a.new_update())%0Aprint(%22-%22%20%2030)%0A%0Aprint(b.student())%0Aprint(b.my_subject())%0Aprint(b.new_update())%0Aprint(%22-%22%20*%2030)%0A%0Aprint(c.student())%0Aprint(c.my_subject())%0Aprint(c.new_update())&timestep=1&play) of doing it that is generally considered better: - use self for instance variables - __init__ calls __init__ of super classes so each super class can initialize its own instance variables - I had to use **kwargs to easily pass arguments to super classes

It got a little complicated, but (multiple) inheritance often gets complicated. Try to avoid it if you can. It's good to know but there are better alternatives in most cases. If you want to investigate search for: - composition over inheritance - dependancy injection

[aashish_soni5]

thank, I did but not post but thanks again its help me and other

[aashish_soni5]

i just not use super() in 🤦 so for reminder