removed deepcopy, delete expendable parameters after use

min_dalle/min_dalle_flax.py

@@ -28,7 +28,7 @@ class MinDalleFlax(MinDalleBase):
             text_token_count = self.config['max_text_length'],
             text_vocab_count = self.config['encoder_vocab_size'],
             layer_count = self.config['encoder_layers']
-        ).bind({'params': self.model_params['encoder']})
+        ).bind({'params': self.model_params.pop('encoder')})
 
 
     def init_decoder(self):
@@ -53,13 +53,17 @@ class MinDalleFlax(MinDalleBase):
         encoder_state = self.encoder(text_tokens)
         if self.is_expendable: del self.encoder
 
-        if self.is_expendable: self.init_decoder()
+        if self.is_expendable:
+            self.init_decoder()
+            params = self.model_params.pop('decoder')
+        else:
+            params = self.model_params['decoder']
         print("sampling image tokens")
         image_tokens = self.decoder.sample_image_tokens(
             text_tokens,
             encoder_state,
             jax.random.PRNGKey(seed),
-            self.model_params['decoder']
+            params
         )
         if self.is_expendable: del self.decoder