How to generate graphics dynamically on the web using Python CGI script?
chris.cavalaria at free.fr
Mon Jan 23 13:50:47 CET 2006
Steve Holden a écrit :
> Debashis Dey wrote:
>> I have a python CGI program. I would like to show a graph within a
>> HTML plage. I would like to dynamically generate the graph using the
>> python CGI script on the web server side and send it to the browser.
>> My question is how can I do this in python? Is there a free tool to do
>> this? Can someone please send me some simple python code to draw
>> simple graphics within HTML (e.g. draw a line or a circle).
> Unfortunately HTML does not include graphics facilities, simply the
> ability to refer to graphical resources.
> The typical way to include a created graphic would be:
> 1. Create a (.png, .jpg, .gif) file showing the
> image you want
> 2. Store it in a temporary file whose name will be
> unique to the current session
> 3. Generate an HTML response including an <IMG ...>
> tag referring to the newly created graphic
> Step 1, which is what you seem to be asking about, can be handled by a
> number of packages, perhaps the best-known of which is PIL, the Python
> Imaging Library - see
> This is open source, and available at no cost. There's a wealth of
> information on how to use it on the web, and many regular readers of
> this group are skilled with it!
Actually, there's a way to store an image inline in the HTML <img> tag.
Here's an example usage :
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