Python TypeError - MySQL executemany

Question

我正在使用MySQLdb模塊插入到我的數據庫中。我有以下代碼

 sqlString = """INSERT INTO PERFORMER (PERFORMER) 
        VALUES (%s) 
        WHERE NOT EXISTS (SELECT * FROM PERFORMER P 
             WHERE P.PERFORMER = %s)""" 
     data = [(c, c) for c in self._performers] 
     self._cursor.executemany(sqlString, data) 

基本上我想從self._performers插入項（這僅僅是名稱的列表）是不是已經在PERFORMERS表。但我發現了以下類型錯誤

TypeError: not all arguments converted during string formatting 

完整跟蹤

Traceback (most recent call last): 
File "tvGuide.py", line 437, in <module> 
     processing.UpdatePerformers() 
File "tvGuide.py", line 307, in UpdatePerformers 
     self._cursor.executemany(sqlString, data) 
File "C:\Python27\lib\site-packages\MySQLdb\cursors.py", line 246, in executemany 
     self.errorhandler(self, TypeError, msg) 
File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 36, in defaulterrorhandler 
     raise errorclass, errorvalue TypeError: not all arguments converted during string formatting 

的self._performers名單很長，但這裏的第一幾個條目

['Lucy Alexander', 'Martin Roberts', 'Alistair Appleton', 'Zak Bagans', 'Aaron Goodwin', 'Nick Groff', 'John Zaffis', 'Ellen Pompeo', 'Patrick Dempsey', 

Answer 1

的樣本+ 1到Nacho，TypeError有些重新改變，使用帶有VALUES子句的WHERE是非法的。