diff --git a/flang/.gitignore b/flang/.gitignore
--- a/flang/.gitignore
+++ b/flang/.gitignore
@@ -1,3 +1,6 @@
+#==============================================================================#
+# This file specifies intentionally untracked files that git should ignore.
+#==============================================================================#
 Debug
 Release
 MinSizeRel
@@ -19,3 +22,6 @@
 formatted
 .DS_Store 
 .vs_code 
+# Byte compiled python modules.
+__pycache__
+*.pyc