在Python中執行許多錯誤

Question

我正在學習python，而且我是新的bie。 我想使用的功能與MySQL和Python和我是個得到錯誤

這是我的腳本

import MySQLdb 
def insert_values(cursor, values): 
    #cursor = self.connection.cursor() 
    cursor.executemany(""" 
     insert into pythontest (name1,name2,name3) 
     values (%s, %s, %s)""", values) 
    cursor.close() 

db = MySQLdb.connect("localhost","root","root","python") 
cursor = db.cursor() 

var1 = ['name1','name2','name3'] 
insert_values(cursor,var1) 

db.close() 

可能有很多錯誤，因爲我正在學習

1)i don't know how can i pass db object in function or passing cusrsor is ok. because i have to call that function many times in for loop

2)is the syntax of values array ok to go in database

錯誤

File "mysql.py", line 10, in insert_values 
    values (%s, %s, %s)""", values) 
    File "build/bdist.linux-i686/egg/MySQLdb/cursors.py", line 216, in executemany 
    File "build/bdist.linux-i686/egg/MySQLdb/connections.py", line 36, in defaulterrorhandler 
_mysql_exceptions.ProgrammingError: not enough arguments for format string 

Answer 1

這是我會怎麼寫（但未經測試）：

import MySQLdb 

def insert_values(db, values): 
    cursor = db.cursor() 
    try: 
     try: 
      cursor.execute(""" 
      insert into pythontest (name1,name2,name3) 
      values (%s, %s, %s)""", *values) 
     except: 
      db.rollback() 
      raise 
     else: 
      db.commit() 
    finally: 
     cursor.close() 

db = MySQLdb.connect("localhost","root","root","python") 

vars = ('name1','name2','name3') 
insert_values(db, vars) 

db.close() 

光標開始交易，所以你不想再使用的多個更新相同的遊標，除非他們是一個原子事務的一部分。

Answer 2

cursor.executemany(""" 
     insert into pythontest (name1,name2,name3) 
     values (%s, %s, %s)""", *values)