Why Can't I call base class function for my derived class object?

[AmirAB]

Hi experts!
Any idea if I am making an error in my code as I am not able to understand Why Can't I call the the base class function for my derived class object?

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class My_base_class():     def __init__(self):         print("This is __init__function of Base Class")     def base_class_func1(self):         print("my base class function")     def base_class_func2(self):         print("my base class function # 2")              class My_derived_class():     def __init__(self):         My_base_class.__init__(self)         print("I am inside my __init__function of my Drived Class")     def base_class_func1(self):         print("my base class function")        def derived_class_func1(self):         print("I am inside my derived class function 01")           my_inherit=My_derived_class() my_inherit.base_class_func2()# I get error while I call function of base class.

Error:'My_derived_class' object has no attribute 'base_class_func2'

[Larz60+]

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class My_base_class():     def __init__(self):         print("This is __init__function of Base Class")     def base_class_func1(self):         print("my base class function")     def base_class_func2(self):         print("my base class function # 2")               class My_derived_class(My_base_class):     def __init__(self):         My_base_class.__init__(self)         print("I am inside my __init__function of my Drived Class")     def base_class_func1(self):         print("my base class function")        def derived_class_func1(self):         print("I am inside my derived class function 01")            my_inherit=My_derived_class() my_inherit.base_class_func2()# I get error while I call function of base class.

[snippsat]

To fix and update some stuff
It not a function when it has self,then is a method that belong to the class.
Start using super(),and look at PEP-8

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class BaseClass:     def __init__(self):         print("This is __init__method of Base Class")       def base_method1(self):         print("Only work in Base class <overridden> in DerivedClass")       def base_method2(self):         print("my base class method # 2")   class DerivedClass(BaseClass):     def __init__(self):         super().__init__()         print("I am inside my __init__method of my Drived Class")       def base_method1(self):         print("DerivedClass class method")       def derived_method1(self):         print("I am inside my derived class method 01")   my_inherit = DerivedClass() my_inherit.base_method2()

Output:
This is __init__method of Base Class
I am inside my __init__method of my Drived Class
my base class method # 2

---

To take a little about Method overriding,which can be confusing.
See my comment Only work in Base class <overridden> in DerivedClass
So using DerivedClass will base_method1 in BaseClass has no functions as is overridden.

To show a example where both method has same name,but we as add information about date.
This can be called pre-filtering and post-filtering if doing method overriding.

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from datetime import datetime   class BaseClass():     def __init__(self):         print("This is __init__method of Base Class")       def base_method1(self, message):         print(f'base_method1 say {message}')       def base_method2(self):         print("My base class method # 2")   class DerivedClass(BaseClass):     def __init__(self):         super().__init__()         print("I am inside my __init__method of my Drived Class")       def base_method1(self, message):         date_info = f'at time {datetime.now():%B %d, %Y}'         super().base_method1(f'{message} {date_info}')       def derived_method1(self):         print("I am inside my derived class method 01")   my_inherit = DerivedClass() my_inherit.base_method2()

Use:

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>>> obj = BaseClass() This is __init__method of Base Class   >>> obj.base_method1('hello') base_method1 say hello

Now using same base_method1 from DerivedClass,it will add info about date.

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>>> obj = DerivedClass() This is __init__method of Base Class I am inside my __init__method of my Drived Class   >>> obj.base_method1('hello') base_method1 say hello at time February 13, 2019