Most of the time (well, all the time if you're smart), you let the
database adapter do parameter substitution for you to avoid SQL
injection attacks (or stupid users). So:
curs.execute("select * from mumble where key = ?", (key,))
If you want to select from several possible keys, it would be nice to
be able to do this:
curs.execute("select * from mumble where key in (?)", (keys,))
but that doesn't work. Instead, you need to do your own parameter
substitution. The quick-and-insecure way to do this is:
curs.execute("select * from mumble where key in (%s)" %
",".join([repr(k) for k in keys]))
I'm pretty sure that's breakable.
Some database adapters provide a function to do explicit substitution
(e.g., mySQLdb.escape, psycopg2._param_escape), but the sqlite3
adapter doesn't. Is there a function floating around out there which
does the right thing, allowing you to safely construct these sorts of
set inclusion clauses?
Thx,
Skip
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