code: def get_pic(self, playingsong, tempfile_path):
          '''获取专辑封面'''
          url = playingsong['picture'].replace('\\', '')
          for _ in range(3):
              try:
                  urllib.urlretrieve(url, tempfile_path)
                  logger.debug('Get cover art success!')
                  return True
              except (IOError, urllib.ContentTooShortError):
                  pass
          logger.error('Get cover art failed!')
          return Falsf get_pic(self, playingsong, tempfile_path):
          '''获取专辑封面'''
          url = playingsong['picture'].replace('\\', '')
          for _ in range(3):
              try:
                  urllib.urlretrieve(url, tempfile_path)
                  logger.debug('Get cover art success!')
                  return True
              except (IOError, urllib.ContentTooShortError):
                  pass
          logger.error('Get cover art failed!')
          return False
docs: 获取专辑封面