# Introductin

defination

The _init.py files are required to make Python treat the directories as containing packages. In the simplest case, __init.py can just be an empty file, but it can also execute initialization code for the package or set the _all variable, described later.

# Reference

http://www.cnpythoner.com/post/2.html

http://stackoverflow.com/questions/448271/what-is-init-py-for