笔者在使用python处理一sqlite3文件时，出现以下错误：
sqlite3.DatabaseError: file is encrypted or is not a databasehttp://stackoverflow.com/questions/11456623/using-an-sqlite3-database-with-wal-enabled-python
找到了答案，原因是这个sqlite开启了WAL。解决方法是：
I just downloaded the latest version of sqlite from http://www.sqlite.org/download.html and overwrote the old .dll in my python27/DLL directory.下载最新版本的sqlitedll文件覆盖python自带的dll文件。
