Update convcode.py

Author: kirlf

commpy/channelcoding/convcode.py

@@ -260,7 +260,8 @@ def visualize(self, trellis_length = 2, state_order = None,
         ax.set_xticks([])
         ax.set_yticks([])
         plt.legend([edge_patches[0], edge_patches[1]], ["1-input", "0-input"])
-        plt.savefig('trellis')
+        #plt.savefig('trellis')
+        plt.show()
 
 
 def conv_encode(message_bits, trellis, termination = 'term', puncture_matrix=None):