python at mrabarnett
Aug 9, 2013, 8:13 AM
Post #2 of 2
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Re: Data transfer from Python CGI to javascript
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On 09/08/2013 07:53, engg [at] cleantechsolution wrote:
> I have written the following program
> #!c:\Python27\Python.exe
> import cgi, cgitb;
> import sys, serial
> cgitb.enable()
> ser = serial.Serial('COM27', 9600)
> myvar = ser.readline()
> print "Content-type:text/html\n\n"
> print """
> <html>
> <head>
> <title>
> Real Time Temperature
> </title>
> <script type="text/javascript">
> window.onload = startInterval;
> function startInterval()
> {
> setInterval("startTime();",1000);
> }
>
> function startTime(myvar)
> {
> document.getElementById('mine').innerHTML ="Temperature" +parseInt(myvar);
>
> }
> </script>
> </head>
> <body>
> <h1>Real Time Temperature:</h1>
> <div id="mine"></div>
> </body></html>
> """
>
> It is giving an output of 'NaN' in the output.
> If the python program is run alone it is giving the correct output.
> Can anyone please help.
> Is it also possible to separate the python and the javascript to two different files. If so how will I get/transfer the data in/from HTML .
> Thanks
>
At a guess I'd say that it's because you have:
setInterval("startTime();",1000);
which will call 'startTime' with no arguments, but:
function startTime(myvar)
which means that it's expecting an argument.
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