--- esh.py-	2016-09-14 23:00:00.000000000 +0900
+++ esh.py	2016-09-15 00:00:00.000000000 +0900
@@ -3,6 +3,9 @@
 import sys
 import yaml
 
+def sys_exec(s):
+	exec s
+
 def is_num(s):
 	try:
 		float(s)