obs_space.keys() returns a view object apparently, which doesn't play…

… nicely with `in`. Needs to be converted to a list for this condition to ever be satisfied. (#275)

Co-authored-by: alex404 <alex404@mailbox.org>

sf_examples/vizdoom/doom/doom_model.py

@@ -17,7 +17,7 @@ def __init__(self, cfg: Config, obs_space: ObsSpace):
         self.encoder_out_size = self.basic_encoder.get_out_size()
 
         self.measurements_head = None
-        if "measurements" in obs_space.keys():
+        if "measurements" in list(obs_space.keys()):
             self.measurements_head = nn.Sequential(
                 nn.Linear(obs_space["measurements"].shape[0], 128),
                 nonlinearity(cfg),