Re: [matplotlib-devel] PDF not readable by Adobe PDF readers

[buckeliger]

Thank you for your reply. I am travelling these days and will try to generate
a stripped down input data file out of the 12 large hdf5 files. However I
find it still very curious that with the same input files, plotting simply
read out data plotting works 

http://ubuntuone.com/50q1yVOKjdmhfqpQljUwW8

but when I process the data (I mask bins and calculate means within) the
mentioned problem occurs (same file as in stackoverflow)

http://ubuntuone.com/0kuZIKYeZQyGckE5jonPy6

so to me it seems reasonable to assume it is actually related to the
computational effort involved. The script for the latter plot takes approx.
30min on a quite fast machine, while upper plot takes no more than 15sec. 

Anyhow, next week I will work on the stripped down data and share what I
get. 



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[matplotlib-devel] unicodeescape traceback on build of latest master in IPython

[Joel B. Mohler]

I'm getting a unicodeescape error importing matplotlib in the IPython 
notebook interface.  The traceback is shown below.  Annotate states that 
https://github.com/matplotlib/matplotlib/commit/bd71341ff645e1e4eb7470a5d2a5541e73bf6d5f
 
introduced the changes to __init__.py which appears to have instigated 
the error.  I was able to import matplotlib 1.3.1 in the IPython 
notebook.  This traceback is appearing for me in both IPython 1.0.0 and 
1.1.0.  I'm on win32 32-bit.  I would appreciate feedback on whether 
this is a real regression or something on my system.

import matplotlib

---
UnicodeDecodeErrorTraceback (most recent call last)
 in ()
> 1 import matplotlib

C:\Python27\lib\site-packages\matplotlib\__init__.py in ()
--> 240 class Verbose:
C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose()
--> 252 for arg in map(six.u, sys.argv[1:]):
C:\Python27\lib\site-packages\six.pyc in u(s)
--> 468 return unicode(s, "unicode_escape")
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 
2-3: truncated \U escape

Thanks,
Joel


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Re: [matplotlib-devel] PDF not readable by Adobe PDF readers

[Jens Nielsen]

If you have Cairo installed and the matplotlib Cairo backend you could try
to test the
pdfs generated with this backend to see if they suffer from the same issue.

i.e. add
```
import matplotlib
matplotlib.use("cairo")
```
to the top of your script.

Depending on where the bug is this may or may not give the same issue.

/Jens

On Fri, Dec 6, 2013 at 10:22 AM, buckeliger  wrote:

> Thank you for your reply. I am travelling these days and will try to
> generate
> a stripped down input data file out of the 12 large hdf5 files. However I
> find it still very curious that with the same input files, plotting simply
> read out data plotting works
>
> http://ubuntuone.com/50q1yVOKjdmhfqpQljUwW8
>
> but when I process the data (I mask bins and calculate means within) the
> mentioned problem occurs (same file as in stackoverflow)
>
> http://ubuntuone.com/0kuZIKYeZQyGckE5jonPy6
>
> so to me it seems reasonable to assume it is actually related to the
> computational effort involved. The script for the latter plot takes approx.
> 30min on a quite fast machine, while upper plot takes no more than 15sec.
>
> Anyhow, next week I will work on the stripped down data and share what I
> get.
>
>
>
> --
> View this message in context:
> http://matplotlib.1069221.n5.nabble.com/PDF-not-readable-by-Adobe-PDF-readers-tp42580p42595.html
> Sent from the matplotlib - devel mailing list archive at Nabble.com.
>
>
> --
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> Develop, test and display web and hybrid apps with a single code base.
> Download it for free now!
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Re: [matplotlib-devel] unicodeescape traceback on build of latest master in IPython

[Thomas Kluyver]

On 6 December 2013 04:55, Joel B. Mohler  wrote:

> C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose()
> --> 252 for arg in map(six.u, sys.argv[1:]):
> C:\Python27\lib\site-packages\six.pyc in u(s)
> --> 468 return unicode(s, "unicode_escape")
> UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position
> 2-3: truncated \U escape
>

I'll bet that one of the arguments starts with C:\Users. It looks like
six.u() can't be applied to arbitrary input (it's intended for literals).

Thomas
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Re: [matplotlib-devel] unicodeescape traceback on build of latest master in IPython

[Joel B. Mohler]

On 12/6/2013 12:45 PM, Thomas Kluyver wrote:
On 6 December 2013 04:55, Joel B. Mohler > wrote:


C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose()
--> 252 for arg in map(six.u, sys.argv[1:]):
C:\Python27\lib\site-packages\six.pyc in u(s)
--> 468 return unicode(s, "unicode_escape")
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in
position
2-3: truncated \U escape


I'll bet that one of the arguments starts with C:\Users. It looks like 
six.u() can't be applied to arbitrary input (it's intended for literals).


Indeed, I suspect you are exactly right.  After pondering the transcript 
below, I think it is bad idea to apply six.u to any sort of relatively 
unknown input.  In any case, I believe this effectively breaks 
matplotlib in the IPython notebook on windows and other very simple 
things.  Behold:


C:\>python -c "import matplotlib" any_old_thing_with_\u_in_it
Traceback (most recent call last):
  File "", line 1, in 
  File "c:\python27\lib\site-packages\matplotlib\__init__.py", line 
240, in 

class Verbose:
  File "c:\python27\lib\site-packages\matplotlib\__init__.py", line 
252, in Verbose

for arg in map(six.u, sys.argv[1:]):
  File "c:\python27\lib\site-packages\six.py", line 468, in u
return unicode(s, "unicode_escape")
UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 
19-20: truncated \u escape


It seems to me that this changeset needs to be rolled back, but I don't 
clearly see the problem that it was intended to fix.


Joel

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Re: [matplotlib-devel] unicodeescape traceback on build of latest master in IPython

[Thomas Kluyver]

On 6 December 2013 10:37, Joel B. Mohler  wrote:

> It seems to me that this changeset needs to be rolled back, but I don't
> clearly see the problem that it was intended to fix.
>

I assume that someone wanted to work with the arguments as text (i.e.
unicode) strings. A robust way to do this would be something like the
str_to_unicode function we have in IPython - it's a no-op on Python 3, and
does a robust decode (using errors='replace') on Python 2.

Thomas
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Re: [matplotlib-devel] unicodeescape traceback on build of latest master in IPython

[Michael Droettboom]

I'll bring this to @minrk's attention in the original issue (#2534)

Mike

On 12/06/2013 02:20 PM, Thomas Kluyver wrote:
On 6 December 2013 10:37, Joel B. Mohler > wrote:


It seems to me that this changeset needs to be rolled back, but I
don't clearly see the problem that it was intended to fix.


I assume that someone wanted to work with the arguments as text (i.e. 
unicode) strings. A robust way to do this would be something like the 
str_to_unicode function we have in IPython - it's a no-op on Python 3, 
and does a robust decode (using errors='replace') on Python 2.


Thomas


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