Can I collapse a Panel in wxPython?

[nuffnough at gmail.com]

Hi.

I have a gui with one frame and 5 panels.  The second panel will only
be required in some cases,  so I am wondering if there is some way I
can only create this panel in the circumstances where it is required,
confirmed by a simple len(list) > 1

If it is possible, I am wondering how I might go about it....  I am not
sure where to put an if statement as there are many different referrals
to panel_2

Letting me know or just pointing me to an example of such a thing would
be fabulous.

TIA