Re: [Pyparsing] Memory issues with 2.0.6

[Paul M. <pt...@au...>]

For those who reported having memory and Unicode issues, if possible, please
download the latest committed version of pyparsing from the SourceForge SVN
repo, and see if this resolves your issues.  

For the memory problem, it is probably not necessary to actually parse any
text, simply invoke the streamline() method on your top-level grammar
instance:

    parser.streamline()

For the Unicode problems, you should stop seeing the UnicodeEncodeError
exceptions when creating your parser.

Thanks for the feedback, everyone - if these changes work out, I'll follow
up with an actual 2.0.7 release in the next day or so.

-- Paul



-----Original Message-----
From: Martijn Vermaat [mailto:m.v...@lu...] 
Sent: Tuesday, November 24, 2015 10:32 AM
To: pyp...@li...
Subject: Re: [Pyparsing] Memory issues with 2.0.6

Dear Paul and others,

(Sorry for replying out of thread, I only just subscribed.)

I can report the same problem with Pyparsing 2.0.6 on this grammar:

https://github.com/mutalyzer/mutalyzer/blob/master/mutalyzer/grammar.py

Memory usage continues to increase.

best,
Martijn


> The problem is definitely in the "cosmetic-only" change to the 
> returned error message for MatchFirst and Or (which also manifests as 
> a Unicode error), and does not even require calling parseString, just 
> streamline().  Thanks for the test case Will, I can repro the problem 
> with it, but am trying to distill it down to a smaller case to add to 
> my unit tests, and to work with in fixing the bug.
>
> For now, impatient users can comment out line 2354 in pyparsing.py:
>
> self.errmsg = "Expected " + str(self)



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