python - Sqlite3 Python Database Locked

Question

I am trying to run an UPDATE query but I keep getting a database locked error. I don't have another thread that is constantly writing, so I don't think that is the problem. I am also closing the connection to the database when ever I am done running the queries in another function. I haven't gotten this error with any of the other queries except for this one.

    x = sqlite3.connect("database.db")
    c = x.cursor()
    c.execute("UPDATE character SET section=? WHERE username=?", ('town','%'+self.username+'%'))
    x.commit()

I have tried it sever different ways, such as:

    x = sqlite3.connect("database.db")
    c = x.cursor()
    c.execute("UPDATE character SET section='town' WHERE username=?", [self.username])

Thanks for your help. x.commit()