[Matplotlib-users] Invalid (trancated) PDFs in Web application
Hallöchen! I generate PDFs of scientific data with Matplotlib. This is done automatically within a Web application written with Django. I generate a PNG thumbnail, too, which always is correct, however, the PDF is truncated in most cases. Now I wonder whether it may be a timeout by the Web server or Django itself. Thus, if Matplotlib takes too long (maybe due to cuncurrent processes), it cannot write the full PDF. However, if it fails, the truncation happens always at the same point in the file. Here's a good PDF: http://www-users.rwth-aachen.de/torsten.bronger/pds_okay.pdf And this is the truncated version: http://www-users.rwth-aachen.de/torsten.bronger/pds_truncated.pdf Thus, this is the trailing part which is missing: http://www-users.rwth-aachen.de/torsten.bronger/pds_missing.txt Does anybody has an idea at which point and why Matplotlib stops working? Tschö, Torsten. -- Torsten Bronger, aquisgrana, europa vetus Jabber ID: [EMAIL PROTECTED] - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Invalid (trancated) PDFs in Web application
Torsten Bronger [EMAIL PROTECTED] writes: Thus, this is the trailing part which is missing: http://www-users.rwth-aachen.de/torsten.bronger/pds_missing.txt Does anybody has an idea at which point and why Matplotlib stops working? The missing parts are the xref table and the trailer, which are written by functions called by close(): def close(self): # End the content stream and write out the various deferred # objects self.endStream() ... self.writeImages() self.writeMarkers() self.writeXref() self.writeTrailer() if not self.passed_in_file_object: self.fh.close() So it looks like writeMarkers() has been called but writeXref() has not. -- Jouni K. Seppänen http://www.iki.fi/jks - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Invalid (trancated) PDFs in Web application
Jouni K. Seppänen [EMAIL PROTECTED] writes: Torsten Bronger [EMAIL PROTECTED] writes: Does anybody has an idea at which point and why Matplotlib stops working? ... if not self.passed_in_file_object: self.fh.close() I wonder if we should flush a file object that was passed in... Could you check if the following patch (committed on the trunk) helps with your problem? Index: lib/matplotlib/backends/backend_pdf.py === --- lib/matplotlib/backends/backend_pdf.py (revision 6178) +++ lib/matplotlib/backends/backend_pdf.py (revision 6179) @@ -446,7 +446,9 @@ self.writeMarkers() self.writeXref() self.writeTrailer() -if not self.passed_in_file_object: +if self.passed_in_file_object: +self.fh.flush() +else: self.fh.close() def write(self, data): -- Jouni K. Seppänen http://www.iki.fi/jks - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Invalid (trancated) PDFs in Web application
Hallöchen! Jouni K. Seppänen writes: Jouni K. Seppänen [EMAIL PROTECTED] writes: Torsten Bronger [EMAIL PROTECTED] writes: Does anybody has an idea at which point and why Matplotlib stops working? ... if not self.passed_in_file_object: self.fh.close() I wonder if we should flush a file object that was passed in... Could you check if the following patch (committed on the trunk) helps with your problem? [...] Yes, it solves my problem. Apparently, if you wait long enough, the rest of the file is indeed written. However, with your patch, I see the whole file immediately, which is much better in the multi-processes environment of an Apache server. Thank you! Tschö, Torsten. -- Torsten Bronger, aquisgrana, europa vetus Jabber ID: [EMAIL PROTECTED] - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot chops off big Latex axis labels
The plot PDFs that matplotlib makes by default seem to be too tiny to contain my biggest axis labels and my poor Latex stuff is chopped in half. How fix? cs - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
