Add .editorconfig rule for Python to agree with flake settings

.editorconfig

@@ -7,4 +7,9 @@ indent_style = space
 indent_size = 3
 charset = utf-8
 trim_trailing_whitespace = true
-insert_final_newline = false
\ No newline at end of file
+insert_final_newline = false
+
+[*.py]
+tab_width = 4
+indent_size = 4
+insert_final_newline = true