test fold is used for sth uncontrol or test sth

yield.py is used to learn how to use the yield

clear.py is used to clear some special users's data in house 

curl.py is used to HTTP request ,like get and post

mysql.py is used to read or write data from database

mysql_tools.py is a tools for mysqldb

wx_user_count.py and dataCount.py is used for data anaylize