查看“脚本和模块”的源代码

*模块不能直接运行
*脚本可以
*参考http://blog.csdn.net/kenkywu/article/details/6743462

创建一个test.py
 def test2():
    print "test2 is running"
 if __name__ == "__main__":#自运行时调用该程序块
    print "test main is working"

 if __name__ == "test":#import时调用该程序块
    print "test is invoked"

>>>python test.py
test main is working
>>>import test
test is invoked
>>> test.test2()
 print "test2 is running"