SQLite3不从数据库读取

Question

I have a database with two columns .One is a primary key auto increment and another is a column for urls. the first is named 'id' and second is named 'longurls'. I have runned the following code to retrieve a 'id' record where longurls = 'X' value .

import sqlite3
long_url = 'http://www.google.com'
conn = sqlite3.connect('database.db')
c = conn.cursor()
c.execute("SELECT id FROM stuff WHERE longurls=?",(long_url,))
k = c.fetchall()
for stuff in k:
    id = stuff[0]
print (id)

This is a picture showing the url exists in database . Only 'none' is printed

Answer 1

I've not yet used sqlite in Python but the bit of your code that looks strange to me is

for stuff in k:
    id = stuff[0]
print (id)

what happens if you define id outside the loop?

id = 0
for stuff in k:
    id = stuff[0]
print (id)

If you could return a list of ids then this will need further modification