update infinfrared, monitored, sht20, ds18b20 python code

Guo Wenxue

2019-03-19 9d78305854750d631a2c74b3fa77eeadf4616856

 modules/python/sht20.py

old mode 100644
new mode 100755
@@ -1,4 +1,6 @@
#!/usr/bin/python
#-*- coding: utf-8 -*-

import fcntl
import time
import unittest