diff --git a/format.sh b/format.sh
new file mode 100644
index 0000000..a8ae3f1
--- /dev/null
+++ b/format.sh
@@ -0,0 +1,3 @@
+isort $(find pyexcel_xls -name "*.py"|xargs echo) $(find tests -name "*.py"|xargs echo)
+black -l 79 pyexcel_xls
+black -l 79 tests