Python using methods from other classes

by

There are two options:

  • instanciate an object in your class, then call the desired method on it
  • use @classmethod to turn a function into a class method

Example:

class A(object):
    def a1(self):
        """ This is an instance method. """
        print "Hello from an instance of A"

    @classmethod
    def a2(cls):
        """ This a classmethod. """
        print "Hello from class A"

class B(object):
    def b1(self):
        print A().a1() # => prints 'Hello from an instance of A'
        print A.a2() # => 'Hello from class A'

Or use inheritance, if appropriate:

class A(object):
    def a1(self):
        print "Hello from Superclass"

class B(A):
    pass

B().a1() # => prints 'Hello from Superclass'

More Related Contents:

  1. Python: Bind an Unbound Method?
  2. Is it possible to overload Python assignment?
  3. How do I access Class member variables in Python?
  4. Difference between methods and attributes in python
  5. What are the parentheses for at the end of Python method names? [duplicate]
  6. How do I access instance variables in Python?
  7. Define a method outside of class definition?
  8. How do I access Class member variables?
  9. class method generates “TypeError: … got multiple values for keyword argument …”
  10. How to get all methods of a Python class with given decorator?
  11. How do I set and access attributes of a class? [duplicate]
  12. Python calling method in class
  13. Calling one method from another within same class in Python
  14. How to find instance of a bound method in Python?
  15. Are functions objects in Python?
  16. How to bind an unbound method without calling it?
  17. How to print instances of a class using print()?
  18. Printing all instances of a class
  19. Which classes cannot be subclassed?
  20. unbound method f() must be called with fibo_ instance as first argument (got classobj instance instead)
  21. How to reload a module’s function in Python?
  22. Why do I get a TypeError that says “takes no arguments (1 given)”? [duplicate]
  23. Python: how to “kill” a class instance/object?
  24. How can I create an object and add attributes to it?
  25. @classmethod vs @staticmethod in Python
  26. List as a member of a python class, why is its contents being shared across all instances of the class?
  27. Correctly extend a tkinter widget using inheritance
  28. Calling a class function inside of __init__
  29. Why are python static/class method not callable?
  30. What is the difference between super() with arguments and without arguments?

Leave a Comment