How to add a current string into an already existing list

[Roy Smith]

In article <mailman.1959.1383429046.18130.python-list at python.org>,
 Chris Angelico <rosuav at gmail.com> wrote:

> On Sun, Nov 3, 2013 at 5:30 AM, Jussi Piitulainen
> <jpiitula at ling.helsinki.fi> wrote:
> > Suppose a database allowed structured values like lists of strings,
> > lists of numbers, or even lists of such lists and more. Then it would
> > actually be a Python issue how best to support that database.
> 
> PostgreSQL supports some higher-level structures like arrays.
> Personally, though, I think the most general representation of a
> Python list in a database is either a varchar field with some form of
> structure (eg the repr of a list), or a separate table with a foreign
> key back to this one.

When you say "database" here, you're really talking about relational 
databases.  There are other kinds.

In MongoDB, for example, storing a list of lists of strings is a 
perfectly reasonable and straight-forward thing to do.  Anything which 
can be represented by bson (which is more or less the same as anything 
which can be represented by json) can be inserted directly.