To show how the ABC concept will be used to create Nephos API

mock_ABC.py

import abc


class Nephos():
  """
  superclass Nephos with all necessary definitions
  """
  __metaclass__ = abc.ABCMeta
  
  # independent function
  def remove(addr):
    pass
  
  # function dependent on Cloud API
  @abc.abstractmethod
  def upload(addr):
    pass
  
  
class GDrive(Nephos):
  """
  Google Drive implementation for Nephos
  """
  def upload(addr):
    # GDrive API method to upload file
    
    
class Dropbox(Nephos):
  """
  Dropbox implementation for Nephos
  """
  def upload(addr):
    # Dropbox API method to upload file