__main__.py usage of Python

Background

Look at flower when you see the __main__.py file, do not know what to do with the specific?

So first test to see.

"Test Code"

The test code directory structure is as follows:

. '--Test    |--__init__.py    |--__main__.py    |--dep.py

__init__.py is empty, indicating that test is a package

__main__.py content is as follows:

[Email protected] ice_test_m 20141024]# more test/__main__.py #!/usr/bin/env python2.7#-*-Coding:utf8-*from __future_ _ Import absolute_importfrom. dep Import DEPCLASSADEP = Depclass ()

　　

dep.py content is as follows:

[Email protected] ice_test_m 20141024]# more Test/dep.pyclass Depclass (object):    def __init__ (self):        print " Init Depclass "

　　

An error occurred while running __main__.py directly:

[Email protected] ice_test_m 20141024]#/test/__main__.py Traceback (most recent call last):  File "./test/__main__ . Py ", line 6, in <module>    DEP import depclassvalueerror:attempted relative import in Non-package

　　

I've met this mistake before.

http://i.cnblogs.com/EditPosts.aspx?postid=4030852

A Python script that contains a relative path import cannot be run directly and can only be referenced as a module.

If you want to run it, you need to do this:

[Email protected] ice_test_m 20141024]# python2.7-m test.__main__    Init depclass

　　

__main__.py usage of Python