On Tue, Jan 29, 2013 at 4:43 PM, Francois Dion <francois.dion@gmail.com> wrote:

On Fri, Jan 18, 2013 at 7:21 PM, Jurgis Pralgauskis
<jurgis.pralgauskis@gmail.com> wrote:
> http://www.skulpt.org/  or  http://www.brython.info/ ?
> They are made on javascript - so if you don't need to save stuff
> serverside - might be good enough.

 

Regarding the original question, about putting text adventures on the
web, it's a funny thing, because that's what I've had on my mind since
I heard about Brython. Initially it didn't even have print(), and to
me that was a basic requirement. so I created a webprint for brython (
http://raspberry-python.blogspot.com/2012/12/brython-browser-python.html
), but then Pierre (the author) added print(). The next piece of the
puzzle was the raw_input() (or in this case input() since Brython is
Python 3.x ). Pierre, Andre (Roberge, fellow edu-sig member) and I
went through various discussions on how this could work. In the end, I
had to go back to my original thought of having input() bringing up a
web browser prompt (javascript prompt) so the call would be blocking,
to flow just like a Python script.

To test this, I grabbed a simple python text adventure from a blog (
http://livingcode.org/entries/2008-02-22_simple-text-adventure/ ) and
plugged it in the web page, with minimum change, namely to convert it
to Python 3.x syntax. The purpose of getting code I didn't write to
test the idea, was that I knew how to code around the limitations of a
web browser (event driven vs the linear approach of a typical Python
script), so if my code ran ok, it wouldn't prove the suitability of
the solution. So the code from the blog ran, but it's not 100% what
one would expect. You can check it out for yourselves here (it's my
Brython playground, on free hosting so it's not particularly fast to
answer):

http://brython.heliohost.org/demos/simpleadventure.html

Having just tried it, I noticed a problem with it that I had not anticipated when thinking of using prompt for input.  the information written in the textarea (?) needs to be scrolled up; however, the prompt prevents a user from doing so.

. 

A more proper way of doing this does require eliminating the while
True: loop and replacing it with a function, and moving the input to
the end of the function:

http://brython.heliohost.org/demos/simpleadventure1.html

This works much better.  The way I would describe, without looking at the code, would be like a state machine. The "world" is stored as an object; when the user enters a command, a single function call is issue [ "update(user_input)"] and some feedback is given.  Impressive.

André

 

Still, it is close to a solution.

Francois

--
www.pyptug.org  -  raspberry-python.blogspot.com  -  @f_dion

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