hello_begins.py

import begin

@begin.subcommand
def add():
    print "add"

@begin.subcommand
def dele():
    print "dele"
 
@begin.start
def main():
    # statements here will be run before subcommands
    # print "do something in main"
    pass
 
if begin.start():
    # statements here will be run after command execution
    # print "do something in the end"
    pass