I want to use pylab (matplotlib) on a machine without X11. I'm trying to
generate onthefly graphics for an apache2 web service, so they do not
have to be displayed on this machine !
When i do
pylab.figure()
I get the error
TclError: couldn't connect to display ":0.0"
I tried setting the DISPLAY environment variable to "", ":0.0" but I got
the same error message.
Any help is very much appreciated. 3 2809
This may help you ... or not
You may have to change your backend :
p13 of the matplotlib user guide: backends
p17 how to change the backend in the matplotlibrc
An example of matplotlibrc ( backend choice is at the beginning ): http://matplotlib.sourceforge.net/matplotlibrc
You may choose PS or SVG or pdf, there might be other possibilities, I
do not know
To save the file : savefig
Marc
Willem-Jan Vriend a écrit :
I want to use pylab (matplotlib) on a machine without X11. I'm trying to
generate onthefly graphics for an apache2 web service, so they do not
have to be displayed on this machine !
When i do
pylab.figure()
I get the error
TclError: couldn't connect to display ":0.0"
I tried setting the DISPLAY environment variable to "", ":0.0" but I got
the same error message.
Any help is very much appreciated.
This may help ... or not ( 2nd part )
try not to do pylab.figure()
in your script:
pylab.plot, or pylab.imshow or whatever you want to use
then
savefig("myFigu re.png") for example
do not use show()
in my case ( with the WXAgg backend ), it works, it generates the png file
Marc
Willem-Jan Vriend a écrit :
I want to use pylab (matplotlib) on a machine without X11. I'm trying to
generate onthefly graphics for an apache2 web service, so they do not
have to be displayed on this machine !
When i do
pylab.figure()
I get the error
TclError: couldn't connect to display ":0.0"
I tried setting the DISPLAY environment variable to "", ":0.0" but I got
the same error message.
Any help is very much appreciated.
Thanks that worked ! I changed the backend to Agg.
Allthough a problem there is that with the backend Agg you only can
write the resulting image to a file or a file like object, it does not
accept the (apache) request handler to write the file to. And I do not
want to save the file to disk first before sending to the client.
WJV
marc wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">This may
help you ... or not
You may have to change your backend :
p13 of the matplotlib user guide: backends
p17 how to change the backend in the matplotlibrc
An example of matplotlibrc ( backend choice is at the beginning ): http://matplotlib.sourceforge.net/matplotlibrc
You may choose PS or SVG or pdf, there might be other possibilities, I
do not know
To save the file : savefig
Marc
Willem-Jan Vriend a écrit :
>I want to use pylab (matplotlib) on a machine without X11. I'm trying to generate onthefly graphics for an apache2 web service, so they do not have to be displayed on this machine !
When i do pylab.figure() I get the error TclError: couldn't connect to display ":0.0"
I tried setting the DISPLAY environment variable to "", ":0.0" but I got the same error message.
Any help is very much appreciated.
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