Re: Matplotlib with Django

I have looked at POST via AJAX, but I started to steer away from it
after I read that a POST request is more for changing or updating data
in a database and GET is more for changing how the data is viewed. Is
my understanding wrong? Honestly, I am a python programmer who is
picking up web development as I go.

In addition, I've been trying to implement this so it works without
javascript if necessary (I've read that this is the best practice if
possible). If I were to implement this w/out javascript with POST
wouldn't I need to pass all the parameters via the URL?

How does youtube shorten their URLs?

Finally, the code snippet your proposed would work, but what I was
trying to do by returning both an image and HTML in a request is
remove the separation between my two views.

On Dec 26, 5:39 am, Hinnack <henrik.gens...@googlemail.com> wrote:
> if you want to offer lots of properties one can change, POST via ajax is the
> better way - as you said
> long URLs can get very ugly - although you could shorten them like youtube
> or others do it.
> GET is far better at this point of time, as only GET requests are cachable
> (as far as I know) by djangos
> middleware.
>
> if I understand you right: you want to mix html with image-data? That is
> impossible. But you can
> add parameters to the header of the http response of the image and put in
> there all settings needed to render the image...
> So you need 2 urls - although you could add a second variable to the url
> e.g. output:
> url(r'^graph_example/(?P<id>\d+)/(?P<output>\w+)/$')
>
> and then a view:
>
> def myview(request, id, output):
>    if output == 'image':
>      # output image data
>    else:
>       # output html data
>
> 2009/12/26 heaviside x <mcdevi...@gmail.com>
>
> > Hello,
>
> > To start, this is not another how do I get matplotlib to work in
> > Django thread.  This is how do I get matplotlib to work better with
> > django.  Before I go on, let me outline what I'm doing.
>
> > I'm currently working on a scientific data manager/viewer which uses
> > matplotlib as the primary graphing workhorse.  My intention is to be
> > able to easily handle all sorts of crazy scientific plots (Smith
> > Charts, Polar Plots with negative values, and other crazy mappings).
> > In the past, matplotlib has been able to easily and elegantly handle
> > these charts, so I'm sticking with it for now.  I also want to be able
> > to take these generated plots and quickly dump them into documents or
> > reports so a save functionality (or drag and drop via the browser) is
> > key.
>
> > Currently, my application is based off the standard matplotlib
> > example.  I have a webpage that contains a static graph.png image and
> > I point that url to another view that renders my matplotlib png and
> > returns it.
>
> > url(r'^graph_example/(?P<id>\d+)/$')
> > url(r'^graph_example/(?P<id>\d+)/graph.png')
>
> > How should I implement editable scales, titles, and labels?  For
> > instance, the graph comes up but I want a different scaling for a
> > report.  I could add all this information as url variables to the
> > view, but that would be extremely ugly.  Is the simple solution a
> > query string?  However, this also yields very ugly URLs.
>
> > Instead of just returning an image in the HttpResposne as the django/
> > matplotlib example shows, is there a way to return the image with the
> > rest of the base page's response?  Removing the need for hard coding a
> > "graph.png" url into my template.
>
> > Any help would be greatly appreciated.
>
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