diff --git a/.gitignore b/.gitignore
index 08a6d86..f6a5f6e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+# Used for developer debugging
+shell.py
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]