Thank you for your help.
Here is what I figured out:
Anytime when views.py is changed it will run once, and the results will be
shown on the server terminal window.
But each function runs only the function is called.
When a function is modified, the Class will run again.
在 2016年2月2日星期二 UTC-6下午12:43:46，James Schneider写道：
>
> On Tue, Feb 2, 2016 at 9:52 AM, Liu Duan <[email protected] <javascript:>>
> wrote:
>
>> If I insert a line in views.py like:
>>
>> Print “Hello world.”
>>
>> Is there a way I can see the result?
>>
>>
>> In other words, how do I monitor views.py running?
>>
>>
>>
> The preferred method is to use logging:
> https://docs.djangoproject.com/en/1.9/topics/logging/
>
> However, if you are running the dev server, print statements within any of
> your code will show on the console output where the dev server is running.
>
> I'd recommend spending a little time getting to know the logging system.
> It is much more flexible and allows you to increase/decrease verbosity when
> needed for troubleshooting, etc. It's also just as easy to use as a print
> statement after the initial setup (writing logging.debug() is pretty much
> as easy as print()).
>
> I also find that having those extra log lines works as pseudo
> documentation (hints are probably a better term) for what is/should be
> happening at that moment in the source.
>
> -James
>
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