bug fix - remove import warning when everything was imported successfully + changed global step api to match TF 1.4

architectures/tensorflow_components/architecture.py

@@ -49,7 +49,7 @@ class TensorFlowArchitecture(Architecture):
         if self.tp.seed is not None:
             tf.set_random_seed(self.tp.seed)
         with tf.variable_scope(self.name, initializer=tf.contrib.layers.xavier_initializer()):
-            self.global_step = tf.contrib.framework.get_or_create_global_step()
+            self.global_step = tf.train.get_or_create_global_step()
 
             # build the network
             self.get_model(tuning_parameters)

coach.py

@@ -30,7 +30,8 @@ from subprocess import Popen
 import datetime
 import presets
 
-screen.warning("Warning: failed to import the following packages - {}".format(', '.join(set(failed_imports))))
+if len(set(failed_imports)) > 0:
+    screen.warning("Warning: failed to import the following packages - {}".format(', '.join(set(failed_imports))))
 
 time_started = datetime.datetime.now()
 cur_time = time_started.time()