Getting started

I'm trying to get started with pysqlite.  Trying a modified sample from the
python 2.5 docs:

<code>
import os

do_create = not os.path.exists("./test.db3")

import sqlite3
conn = sqlite3.connect("./test.db3")
c = conn.cursor()

if do_create:
    # Create table
    c.execute('''create table stocks
    (date text, trans text, symbol text,
     qty real, price real)''')

    # Insert a row of data
    c.execute("""insert into stocks
              values ('2006-01-05','BUY','RHAT',100,35.14)""")


c.execute("""select * from stocks""")
for row in c:
    print row

<code/>

Running the code the first time, the file ./test.db3 is created
and the one row is listed fine.  Running the code the second time,
nothing is listed.

Why is the row not written to disk, and what should I do so that
it will be written?

Thanks,
Thomas