Fix python linting error

Author: AmirhosseinPoolad

run_reg_test.py

@@ -199,8 +199,9 @@ def vtr_command_main(arg_list, prog=None):
         print("All tests passed")
     elif tests_run and total_num_func_failures != 0 or total_num_qor_failures != 0:
         print("Error: {} tests failed".format(total_num_func_failures + total_num_qor_failures))
-    
-    # If the QoR parsing script throws an exception, it returns -1. This could potentially cancel a run failure and result in a false negative.
+
+    # If the QoR parsing script throws an exception, it returns -1.
+    # This could potentially cancel a run failure and result in a false negative.
     # Absolute value is taken to avoid that.
     sys.exit(abs(total_num_func_failures) + abs(total_num_qor_failures))
 

vtr_flow/scripts/python_libs/vtr/parse_vtr_task.py

@@ -437,13 +437,13 @@ def check_two_files(
         second_metrics = second_results.metrics(arch, circuit, script_params)
         first_metrics = first_results.metrics(arch, circuit, script_params)
 
-        if first_metrics == None:
+        if first_metrics is None:
             num_qor_failures += 1
             print("Required case {}/{} missing from {} results: {}".format(
                     arch, circuit, first_name, first_results_filepath
                 ))
             continue
-        
+
         first_fail = True
         for metric in pass_requirements.keys():