Avoid import of whole util module

Author: fjwillemsen

kernel_tuner/integration.py

@@ -4,7 +4,7 @@
 
 from jsonschema import validate
 
-from kernel_tuner import util
+from kernel_tuner.util import get_instance_string, looks_like_a_filename, read_file
 
 #specifies for a number of pre-defined objectives whether
 #the objective should be minimized or maximized (boolean value denotes higher is better)
@@ -205,8 +205,8 @@ def top_result(item):
         meta["version_number"] = "1.0"
         meta["kernel_name"] = kernel_name
         if kernel_string and not callable(kernel_string) and not isinstance(kernel_string, list):
-            if util.looks_like_a_filename(kernel_string):
-                meta["kernel_string"] = util.read_file(kernel_string)
+            if looks_like_a_filename(kernel_string):
+                meta["kernel_string"] = read_file(kernel_string)
             else:
                 meta["kernel_string"] = kernel_string
         meta["objective"] = objective
@@ -337,7 +337,7 @@ def _select_best_common_config(results, objective, objective_higher_is_better):
     for config in results:
         params = config["tunable_parameters"]
 
-        config_str = util.get_instance_string(params)
+        config_str = get_instance_string(params)
         #count occurances
         results_table[config_str] = results_table.get(config_str,0) + 1
         #add to performance