dot notation

You have made it through the end of the book. Do you understand the following?

AClass.attribute

in the same file

class AClass(object):

    attribute = None

or

class AClass(object):

    def __init__(self, attribute):
        self.attribute = attribute

AClass.method()

in the same file

class AClass(object):

    def method(self):
        return None

AClass.method(*args, **kwargs)

in the same file

class AClass(object):

    def method(self, *args, **kwargs):
        return None

module.attribute

• the definiton in module.py

  attribute = None
  

• how to use in a different file

  import module
  
  module.attribute
  

module.function()

• the definiton in module.py

  def function():
      return None
  

• how to use in a different file

  import module
  
  module.function()
  

module.function(*args, **kwargs)

• the definiton in module.py

  def function(*args, **kwargs)
  

• how to use in a different file

  import module
  
  module.function(*args, **kwargs)
  

module.AClass.attribute

• the definiton in module.py

  class AClass(object):
  
      attribute = None
  

how to use in a different file

import module

instance = module.AClass()
instance.attribute

• or the definition in module.py

  class AClass(object):
  
      def __init__(self, attribute):
          self.attribute = attribute
  

  how to use in a different file

  import module
  
  instance = module.AClass(attribute='Attribute')
  instance.attribute
  

module.AClass.method()

• the definiton in module.py

  class AClass(object):
  
      def method(self):
          return None
  

• how to use in a different file

  import module
  
  instance = module.AClass()
  instance.method()
  

module.AClass.method(*args, **kwargs)

• the definiton in module.py

  class AClass(object):
  
      def method(self, *args, **kwargs):
          return None
  

• how to use in a different file

  import module
  
  instance = module.AClass()
  instance.method(*args, **kwargs)