为什么我在这个简单的python sqlite3更新查询代码上遇到“数据库被锁定”错误？

Question

Every SQLITE query I make usually goes fine, except I cannot seem to be able to update the DB.

db = sqlite3.connect("data.db")
cursor = db.cursor()
str_datetime = str(datetime.datetime.now())
cursor.execute("""UPDATE ads SET publish_end_datetime = ? WHERE ad_code = ?""", (str_datetime, 1411671200))
db.commit() # is this commit statement even necessary?
db.close()

I get the following operational error:

OperationalError Traceback (most recent call last) in () 3 str_datetime = str(datetime.datetime.now()) 4 ----> 5 cursor.execute("""UPDATE ads SET publish_end_datetime = ? WHERE ad_code = ?""", (str_datetime, 1411671200)) 6 db.commit() 7 db.close()

OperationalError: database is locked

Answer 1

I think I've found the problem. Whenever the DB is in use, a database.db-journal file is created in the same location. That's the main indicator that the DB is in use. I have not found what was "using" my DB, but I've found how to solve my problem. It appears that OneDrive might have been the problem. I copied my data.db on the desktop, outisde of OneDrive, and I finally have been able to get the update statement to work.

I hope it helps other people.