Re: python, pythontex and plots

[Piet van Oostrum]

chitt...@uah.edu writes:

 True, I did not explain what I was trying to do.

 pythontex is a package that allows the inclusion of python code within a
 LaTeX document - (sort of like python.sty, but IMO, better) - I use
 it along with noweb to create documents that contain documentation,
 code and output of the code - and pythontex allows me to access variables
 within the python code embedded in the LaTeX - except for the case
 I mentioned ... Within the python code (inside the LaTeX document) I had
 a savefig(outputfile) and I was trying to reference the outputfile
 using \py{outputfile}

It could be that \includegraphics needs an expandable TeX form for its
filename, and \py probably isn't. I haven't tried pythontex yet (I
didn't know about it before your posting), so I can only guess. I am
going to try it out later. But if I am correct then the following might
work:

\newcommand{\filename}{}
\edef\filename{\py{outputfile}}

\includegraphics[scale=0.75]{\filename}

-- 
Piet van Oostrum p...@vanoostrum.org
WWW: http://pietvanoostrum.com/
PGP key: [8DAE142BE17999C4]
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Re: python, pythontex and plots

[chitturk]

True, I did not explain what I was trying to do.

pythontex is a package that allows the inclusion of python code within a
LaTeX document - (sort of like python.sty, but IMO, better) - I use
it along with noweb to create documents that contain documentation,
code and output of the code - and pythontex allows me to access variables
within the python code embedded in the LaTeX - except for the case
I mentioned ... Within the python code (inside the LaTeX document) I had
a savefig(outputfile) and I was trying to reference the outputfile
using \py{outputfile}

It may be that someone on the comp.text.tex group may have an answer
(there may be users of pythontex on that newsgroup)

On Sunday, September 22, 2013 11:54:20 PM UTC-5, rusi wrote:
 Take a look at babel
 
 http://www.cs.unm.edu/~eschulte/data/CISE-13-3-SciProg.pdf
 
 http://orgmode.org/worg/org-contrib/babel/intro.html
 
 
 
 Its my impression that babel supports everything and more that pylatex does
 
 
 
 ...the catch is that its under emacs...!!

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python, pythontex and plots

[chitturk]

\documentclass[12pt]{article}
\usepackage{graphicx} 
\usepackage{wrapfig} % Allows in-line images
\usepackage{pythontex}
\setpythontexworkingdir{.}
\begin{document}

This is an example of using pythontex

\begin{pycode}

import pylab as p 
import numpy as np
x = np.linspace(0.0,1.0,10)
y = 2.0*x + 5.0
xmax = max(x)
ymax = max(y)
p.plot(x,y)
outputfile = 'myplot.png'
p.savefig(outputfile)
p.clf()

\end{pycode}

% this works fine, I can print the name of the output file, variables

The plot is named \py{outputfile}, the max in x was \py{xmax} and \py{ymax}

% now I would like to plot it, this works 

\includegraphics[scale=0.75]{myplot.png}

% but when I do this

%\includegraphics[scale=0.75]{\py{outputfile}}

% I get 

%! File ended while scanning definition of \filename@base.
%inserted text 
%}
% no pdf 



\end{document}
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Re: python, pythontex and plots

[Steven D'Aprano]

I don't usually top post, but for this I'll make an exception because I 
have *no idea* what any of your post means.

Are you actually asking a question? I can't see a question mark in it, so 
there's no explicit question. Are you just sharing something interesting 
you have learned? Expecting us to read your mind and intuit what the 
question is?

Why do nearly, but not quite all, the lines in your post start with % or 
\  or sometimes both? It looks like Postscript rather than Python.

Perhaps you should try again, and this time don't assume that we're 
familiar with whatever it is you're doing. Remember to include natural 
language explaining what your problem is, what result you expected, what 
result you actually got. In this forum, use English please. This is 
*especially* critical if using an unusual technology that most people are 
not familiar with.

I strongly recommend that first you read this:

http://sscce.org/‎

Its written for Java developers, but the same basic principles apply for 
Python. Remember that the number one language you should be using for 
communication is natural language (English in this forum) and code only 
second.

Thank you.


Steve

On Sun, 22 Sep 2013 13:26:06 -0700, chitturk wrote:

 \documentclass[12pt]{article}
 \usepackage{graphicx}
 \usepackage{wrapfig} % Allows in-line images \usepackage{pythontex}
 \setpythontexworkingdir{.}
 \begin{document}
 
 This is an example of using pythontex
 
 \begin{pycode}
 
 import pylab as p
 import numpy as np
 x = np.linspace(0.0,1.0,10)
 y = 2.0*x + 5.0
 xmax = max(x)
 ymax = max(y)
 p.plot(x,y)
 outputfile = 'myplot.png'
 p.savefig(outputfile)
 p.clf()
 
 \end{pycode}
 
 % this works fine, I can print the name of the output file, variables
 
 The plot is named \py{outputfile}, the max in x was \py{xmax} and
 \py{ymax}
 
 % now I would like to plot it, this works
 
 \includegraphics[scale=0.75]{myplot.png}
 
 % but when I do this
 
 %\includegraphics[scale=0.75]{\py{outputfile}}
 
 % I get
 
 %! File ended while scanning definition of \filename@base. %inserted
 text
 %}
 % no pdf
 
 
 
 \end{document}

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Re: python, pythontex and plots

[chitturk]

1) The file is LaTeX
2) the % means LaTeX will ignore it.
3) The question was about using pythontex with LaTeX 
4) I included the file so you (OK, others) could see what I was trying
5) The problem had to do with accessing a file name within the python 
   script using \py{outputfile}
6) pythontex is a terrific package that I enjoy using
7) I was looking for help on debugging this error.
8) I was trying to find out why I could not do \py{outfilename}

On Sunday, September 22, 2013 7:58:59 PM UTC-5, Steven D'Aprano wrote:
 I don't usually top post, but for this I'll make an exception because I 
 
 have *no idea* what any of your post means.
 
 
 
 Are you actually asking a question? I can't see a question mark in it, so 
 
 there's no explicit question. Are you just sharing something interesting 
 
 you have learned? Expecting us to read your mind and intuit what the 
 
 question is?
 
 
 
 Why do nearly, but not quite all, the lines in your post start with % or 
 
 \  or sometimes both? It looks like Postscript rather than Python.
 
 
 
 Perhaps you should try again, and this time don't assume that we're 
 
 familiar with whatever it is you're doing. Remember to include natural 
 
 language explaining what your problem is, what result you expected, what 
 
 result you actually got. In this forum, use English please. This is 
 
 *especially* critical if using an unusual technology that most people are 
 
 not familiar with.
 
 
 
 I strongly recommend that first you read this:
 
 
 
 http://sscce.org/
 
 
 
 Its written for Java developers, but the same basic principles apply for 
 
 Python. Remember that the number one language you should be using for 
 
 communication is natural language (English in this forum) and code only 
 
 second.
 
 
 
 Thank you.
 
 
 
 
 
 Steve
 
 
 
 On Sun, 22 Sep 2013 13:26:06 -0700, chitturk wrote:
 
 
 
  \documentclass[12pt]{article}
 
  \usepackage{graphicx}
 
  \usepackage{wrapfig} % Allows in-line images \usepackage{pythontex}
 
  \setpythontexworkingdir{.}
 
  \begin{document}
 
  
 
  This is an example of using pythontex
 
  
 
  \begin{pycode}
 
  
 
  import pylab as p
 
  import numpy as np
 
  x = np.linspace(0.0,1.0,10)
 
  y = 2.0*x + 5.0
 
  xmax = max(x)
 
  ymax = max(y)
 
  p.plot(x,y)
 
  outputfile = 'myplot.png'
 
  p.savefig(outputfile)
 
  p.clf()
 
  
 
  \end{pycode}
 
  
 
  % this works fine, I can print the name of the output file, variables
 
  
 
  The plot is named \py{outputfile}, the max in x was \py{xmax} and
 
  \py{ymax}
 
  
 
  % now I would like to plot it, this works
 
  
 
  \includegraphics[scale=0.75]{myplot.png}
 
  
 
  % but when I do this
 
  
 
  %\includegraphics[scale=0.75]{\py{outputfile}}
 
  
 
  % I get
 
  
 
  %! File ended while scanning definition of \filename@base. %inserted
 
  text
 
  %}
 
  % no pdf
 
  
 
  
 
  
 
  \end{document}

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Re: python, pythontex and plots

[Steven D'Aprano]

chitturk, you will probably get better answers if you actually explain 
your question rather than writing as if we can read your mind. More 
comments below:

On Sun, 22 Sep 2013 19:16:35 -0700, chitturk wrote:

 1) The file is LaTeX
 2) the % means LaTeX will ignore it.

Shouldn't you ask this on a LaTeX forum then? How is your problem related 
to Python? If it is a Python error, you should explain how you know it is 
a Python error rather than a LaTeX error, because to me it looks like a 
LaTeX error.


 3) The question was about using pythontex with LaTeX 

And pythontex is what? An interface to Python via LaTeX? Are you getting 
a Python error or a LaTeX error? It seems to me that you are getting a 
LaTeX error, and that Python is irrelevant here. If you have information 
that suggests otherwise, you should share it with us.


4) I included the file so you (OK, others) could see what I was trying 

Problem is that it is not clear what parts are the file and what parts, 
if any, are your commentary on the file. You shouldn't assume that Python 
programmers will be experts on LaTeX syntax and be able to read your code.


 5) The problem had to do with accessing a file name within the python
script using \py{outputfile}

If I am reading your file/comments correctly, the error you get is not a 
Python error, but a LaTeX error:


%! File ended while scanning definition of \filename@base. %inserted
text
%}
% no pdf


If I am wrong, explain to me how you decided that this was a Python error 
rather than LaTeX. I've been using Python for over 15 years, and this is 
the first time I've seen anything even remotely like that. 

It is not clear to me whether no pdf is your comment, the output of 
pythontex, the output of LaTeX, or something else. It is also not clear 
whether %inserted text is literally part of the output, or just a 
placeholder for something you thought was irrelevant.


 6) pythontex is a terrific package that I enjoy using 

Glad to hear it.


 7) I was looking for help on debugging this error. 
 8) I was trying to find out why I could not do \py{outfilename}

\py{outputfilename} isn't Python code, so I'm not sure why you think a 
Python forum is the right place to ask about this. For us to help you, 
we'll probably need to know:

- What is outputfilename?

- Are you sure it corresponds to an actual file? A readable file?
  (Check the permissions.) Containing the right output? E.g. if you're
  expecting a PDF file, but giving it a PNG file, it probably won't work.

- What Python code ends up being executed when you run \py
  {outputfilename}?

- Can you run that code successfully from Python itself, bypassing
  pythontex?

- If not, what result did you expect? What result did you get?

- If you got an exception, what was the entire exception?

- Any other relevant information that comes up while investigating.


Help us to help you. Excessively concise questions written for an 
audience who already knows everything you know is not likely to get a lot 
of help.


-- 
Steven
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Re: python, pythontex and plots

[rusi]

Take a look at babel
http://www.cs.unm.edu/~eschulte/data/CISE-13-3-SciProg.pdf
http://orgmode.org/worg/org-contrib/babel/intro.html

Its my impression that babel supports everything and more that pylatex does

...the catch is that its under emacs...!!
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