试图使用python检查sqlite数据库中是否存在用户名

Question

Trying to check if the username is exists in sqlite using python 3

This is what i've tried

    checkUsername = self.c.execute("SELECT username FROM Login WHERE username = ? AND position = ?",
                   (username, manager))

    if checkUsername != 0:
        print("Wrong username and password")
    else:
        print("correct")

Answer 1

If you're using the sqlite3 module, cursor.execute doesn't return the results. You need to use cursor.fetchone() or cursor.fetchall() to get the results, which come back as a tuple or list of tuples.

Check the documentation here for some more details.