Question

I use the following code to make a booking in a system yet it returns an error:

conn = sqlite3.connect('SADS.db')
cur = conn.cursor()
choice = raw_input("What day would you like to book seats on? F/S : ")
if choice == "F":
    bookseats = [0,1]
    print"What seats would you like to book?"
    bookseats[0] = raw_input("Choice : ")
    bookseats[1] = raw_input("What is their user ID? : ")
    cur.execute("SELECT * FROM seats WHERE Booked='N'")
    rows = cur.fetchone()
    for row in rows:
        if row == None:
            break
        elif row[1] == bookseats[0] and row[4] == "N" and row[3] == "F":
            print "Seat Number:" , row[1] ,"Is now booked!"
            cur.execute("UPDATE seats SET Booked =N AND CustID=?", (bookseats[0]))

Error:

TypeError: 'float' object has no attribute '__getitem__'

I am really confused what the error is and how I fix it?

Answer 1

You are looping over the result of rows = cur.fetchone(), which retrieves just one row. Remove that line and just loop directly over the cursor:

cur.execute("SELECT * FROM seats WHERE Booked='N'")
for row in cur:

You do not need to test for row == None either, nor do you need to test if the Booked column is equal to N. Simplify the loop to:

cur.execute("SELECT * FROM seats WHERE Booked='N' AND CustID=?", (bookseats[0],))
row = cur.fetchone()
if row is not None and row[3] == "F":
    print "Seat Number:" , row[1] ,"Is now booked!"
    cur.execute("UPDATE seats SET Booked =N AND CustID=?", (bookseats[0]))

You can just ask the database for rows that match your bookseats[0] column, and where the 3rd column is set to F. You didn’t show us your schema so it is hard to recommend how you can update your query for that.

Your UPDATE query is incorrect, you probably meant:

cur.execute("UPDATE seats SET Booked='Y' WHERE CustID=?", (bookseats[0],))

instead.

Your SQL query and update look suspect though; without knowing the full schema it does look as if you are mixing your seat number and customer number in places.