If your schema is dynamic, in most languages there isn't much you can do, but at...

gpderetta 77 days ago | parent | context | favorite | on: Query Your Python Lists

If your schema is dynamic, in most languages there isn't much you can do, but at least in python

   Q(name=contains('k'))

it is not particularly more complex to write and certainly more composable, extensible and checkable.

Alternatively go full eval and do

   Q("'k' in name")