text: import argparse
  
  def sayHello(name=None):
      '''a function that says Hello
      
      Parameters
      ----------
      name : str or ``None``, optional
          This is the name that someone is going to greet you with, 
          by default ``None`` in which case, this is going to return
          the string ``'Hello World'``
      
      Returns
      -------
      str
          string to be returned
      '''
  
      if name is None:
          return f'Hello World'
      else:
          return f'Hello {name}'
  
      
  
  def main():
  
      parser = argparse.ArgumentParser(prog ='activeLearning', 
                                       description ='Some basic definition for the package.')
      args = parser.parse_args()
  
      print('Arguments passed to the parser:')
      print(args)
  
      sayHello()
  
      return