code: def statement(self,phrase):
          
          t = datetime.now()
          s = str(t) + ' ' + str(phrase) + '\n'
          if self.echo:
              print(s,end='')
          if self.filename:
              self.f.write(s)
              self.f.flush()
docs: log a one time statement
  
          Parameters
          ----------
          phrase : str
              statement to log