code: def _transschema(x):
      
      if isinstance(x, tuple):
          return x.__class__(_transschema(x[0]), *x[1:])
      elif isinstance(x, dict):
          return dict((_qualify_map(key, _transschema(val)) for key, val in x.iteritems()))
      elif isinstance(x, list):
          return map(_transschema, x)
      else:
          return x
docs: Transform a schema, once loaded from its YAML representation, to its
      final internal representation