pytest config added and pep8 corrections

.gitignore

@@ -9,3 +9,4 @@ dist/
 __pycache__/
 *.so
 *~
+.cache

common_helper_files/fail_safe_file_operations.py

@@ -83,7 +83,7 @@ def _get_counted_file_path(original_path):
     tmp = re.search(r"-([0-9]+)\Z", original_path)
     if tmp is not None:
         current_count = int(tmp.group(1))
-        new_file_path = re.sub(r"-[0-9]+\Z", "-{}".format(current_count+1), original_path)
+        new_file_path = re.sub(r"-[0-9]+\Z", "-{}".format(current_count + 1), original_path)
     else:
         new_file_path = "{}-1".format(original_path)
     return new_file_path

pytest.ini

+[pytest]
+addopts = --pep8 -v
+pep8ignore = 
+    *.py E501