My guess is that zero is not being printed because the internals of
self.response.out.write probably look something like this:
def write(output):
if output:
# Spit it out
else:
# Do not spit out anything
Since your zero effectively returns false in the above if condition,
nothing is printed out.
Conclusion: Always convert the final output to a string before sending
it to self.response.out.write (since it's sent to the browser as a
string anyway).
On Dec 22, 9:44 pm, Phoenix <peece...@gmail.com> wrote:
> Thanks for your concern Wesley..
>
> Yes.. by "screen" I meant "browser"
>
> As I had said in my first message, printing the 0 on browser isn't my
> objective. I am actually write services in which I just get the input,
> process it and send the processed output in JSON format. So, in this I
> do not need to write anything on the browser using "server side
> script".
>
> But the thing is, the code I wrote didn't work and I needed it debug
> it by writing each and every relevant thing on the browser. And
> printing that zero comes here..
>
> I tried something like self.response.out.write(str(0)) and 0 is there
> on the screen.. but I generally do not need to do this with any other
> value.. let it be a python list or dictionary.. so I'm just not able
> to know the reason or logic behind this..
>
> By the way, a good news.. ! That service for which I was writing that
> code is done. It's working.. :) But that cofusion of mine is still
> intact.. :(
>
> "why" that zero is not coming?
>
> Thanks,
> Chirag S Pithadiya.
>
> On Dec 22, 2:47 pm, Wesley Chun <wesc+...@google.com> wrote:
>
> > greetings! i've read your messages and would like to find out more
> > about what you are trying to do. i will try to help anyway, based on
> > what you have written so far.
>
> > if you are explicitly writing out a response as text/plain, you still
> > need to write out a string, regardless of the value. you mention using
> > "print" vs. "write." when you're developing a web application, you
> > cannot simply use "print" because that is intended for a user and *is*
> > output to the screen.
>
> > with Google App Engine, you're writing a *web application*, and in
> > such cases, there is no "screen output." rather than a terminal
> > window, the end consumer of the data you "write" out is to a web
> > browser. now if by "screen," you mean web browser, then please
> > disregard what i just said above, because it wasn't clear what you
> > meant by "screen."
>
> > for web applications, you must output either plain text (MIME file
> > type text/plain) or standard HTML (MIME type text/html). regardless of
> > whether you use 0, 1, 100, or 1000, as integer literals, or as a value
> > of a variable 'new_index', you need to convert it to a string first,
> > i.e., str(0), str(100), str(new_index).
>
> > also, if you write this out directly, then the output will be
> > text/plain. if you want it to look nice in a web browser, you need to
> > enclose the value in valid HTML:
> > self.response.out.write('<HTML><BODY>%d</BODY></HTML>' % new_index) or
> > something similar.
>
> > if this doesn't answer your question, hopefully it will help you get
> > started. or if your problem is completely different, please give us
> > more information so we can help you better.
>
> > thanks!
> > -wesley
> > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> > "Core Python Programming", Prentice Hall, (c)2007,2001
> > "Python Fundamentals", Prentice Hall, (c)2009
> > http://corepython.com
>
> > wesley.j.chun :: wesc+...@google.com
> > developer relations :: google app engine
>
> > On Mon, Dec 21, 2009 at 11:47 PM, Phoenix <peece...@gmail.com> wrote:
> > > It works.. but it's of no use to me.. I need to use a variable which
> > > can have 0 as a value and while debugging I need to be sure whether
> > > the value of this variable is coming correctly or not..
> > > It works with "print" but not working with "write"..
> > > print the "0" isn't my objective.. but I'm just confused why I can't
> > > print 0...)
> > > Any other integer is being printed.. then why this issue with 0?
>
> > > thanks for your reply..
>
> > > On Dec 22, 12:43 pm, Nickolas Daskalou <n...@daskalou.com> wrote:
> > >> Have you tried:
>
> > >> self.response.out.write(str(0))
>
> > >> ?
>
> > >> On Dec 22, 5:11 pm, Phoenix <peece...@gmail.com> wrote:
>
> > >> > Hi.. this is the code I'm using..
>
> > >> > self.response.out.write(0) and "0" is not being on screen.. even if
> > >> > this "0" an Integer is in some variable.. like this..
> > >> > new_index = 0
> > >> > self.response.out.write(new_index)
>
> > >> > and nothing comes on screen..
>
> > >> > can anyone have any idea?
>
> > >> > thanks in advance..
>
>
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