Python实现将元组中的元素作为参数传入函数的操作

def execute_multi_sql(self, sql, params_list):
 result_list = []
  try:
   self._db_connection = self._db_connection_pool.connection()
   self._db_cursor = self._db_connection.cursor()
 for params in params_list:
  combined_sql = []
  combined_sql.append(sql)
  combined_sql.append('.format(')
  combined_sql.append(','.join(map(str, params)))
  combined_sql.append(')')
  combined_sql = ''.join(combined_sql)
  logger.debug("executing sql: %s" % combined_sql)
  self._db_cursor.execute(combined_sql)
  result = self._db_cursor.fetchall()
  logger.debug(u"SQL语句已经被执行, 结果是:\n %s" % str(result))
  result_list.append(result)
 except Exception as e:
   logger.exception(u"执行sql语句时，发生了错误: %s", e.message)
   raise
  finally:
   self._db_connection.close()
   return result_list

from DBUtils.PooledDB import PooledDB
import logging
......

 def execute_multi(self, sql, params_list):
  if not isinstance(params_list, list):
   raise Exception(u'传入参数要求是列表类型,请检查传入参数类型!')
  result_list = []
  try:
   self._db_connection = self._db_connection_pool.connection()
   self._db_cursor = self._db_connection.cursor()

   for params in params_list:
    # 将每一个元组中存的参数传入format中,替换sql中的变量值.
    # 如果数组中的元素不是元组,则sql中只有一个变量需要替换,将参数直接替换.
    if isinstance(params, tuple):
     combined_sql = sql.format(*params)
    else:
     combined_sql = sql.format(params)

    logger.debug("executing sql: %s" % combined_sql)
    self._db_cursor.execute(combined_sql)
    result = self._db_cursor.fetchall()
    logger.debug(u"SQL语句已经被执行, 结果是:\n %s" % str(result))
    if len(result) > 0:
     result_list.append(result)
  except Exception as e:
   logger.exception(u"执行sql语句时，发生了错误: %s", e.message)
   raise
  finally:
   self._db_connection.close()
   return result_list

# 利用元组作为函数返回值：输出最值和个数
def yuanzu(*xxx):
  i = max(xxx)
  j = min(xxx)
  print("最大值是%s" % i)
  print("最小值是%s" % j)
  l = len(xxx)
  print("长度是{0}".format(l))

yuanzu(1,2,5,6,5)