Python SQL查询与函数中的变量

Question

如何从函数中获取变量以在SQL查询中使用它？

示例：我在Python中有函数：

def week(monday, friday)
     monday = '2015-12-14'
     friday = '2015-12-18'
     ...[some other code]...
     mysql.execute('''SELECT COUNT(*) FROM orders WHERE (data BETWEEN Date(%s) AND Date(%s)) ''', [monday,friday,])
     ...[some other code]...

它的工作正确，但此函数monday = '2015-12-14'

中有固定日期

这个产生错误：

（只是禁用了变量声明，因为我想从函数中获取它）

def week(monday, friday)
    #monday = '2015-12-14'
    #friday = '2015-12-18'
     ...
     mysql.execute('''SELECT COUNT(*) FROM orders WHERE (data BETWEEN Date(%s) AND Date(%s)) ''', [monday,friday,])

...[some other code]...
week('2015-12-14', '2015-12-18')

  

警告：日期时间值不正确：＆＃39; 1＆＃39;