test.py

class Player:
  def __init__(self, type):
    self.type = type
  
  def do_work(self, *params):
    if self.type == 'file':
      # Do something like this
      lines = open(*params).readlines()
      for line in lines:
        self.do_something(line)
      pass
    elif self.type == 'internet':
      # Do something
      pass
    elif self.type == 'local_network':
      # Do something
      pass  
      
  def do_something(self, line):    
    pass