code: def dump_netrc(self):
      
      rep = ''
      for host in self.hosts.keys():
          attrs = self.hosts[host]
          rep = rep + 'machine ' + host + '\n\tlogin ' + str(attrs[0]) + '\n'
          if attrs[1]:
              rep = rep + 'account ' + str(attrs[1])
          rep = rep + '\tpassword ' + str(attrs[2]) + '\n'
      for macro in self.macros.keys():
          rep = rep + 'macdef ' + macro + '\n'
          for line in self.macros[macro]:
              rep = rep + line
          rep = rep + '\n'
      return rep
docs: Dump the class data in the format of a .netrc file.