Python + SQLite. Delete all found lines?

Question

Python

I have a database with an indefinite number of rows and 9 columns.
I get the lines I need like this:

dbcursor.execute('select * from portscan where ip=?', (hostip,))
rows = dbcursor.fetchall()

But how to delete all found lines?
The code -

dbcursor.execute("delete from portscan where ip='%s'" % hostip)

- it seems to work as it should, but the size of the database does not decrease.

Answer 1

> the size of the database does not decrease...
habrahabr.ru/post/172085