> Can probably just change it to [snip]

Looks good.

> Does that mean that this module is imported with import des_meds?

Normally, you would just `import galsim`.  Then you use items in here as (e.g.) `galsim.des.write_meds(...)`.  No need for a special import, since it's done in the galsim `__init__.py`.  But nothing from here is brought up into the `galsim` namespace.  Everything needs to be explicitly given as `galsim.des.blah`.