It's Python 2.7.5 |Anaconda 1.6.2 (64-bit)| (default, Jul  1 2013, 
12:37:52) [MSC v.1500 64 bit (AMD64)]

Thanks for your help, I'll see tomorrow if can pull such branch and build it

best,

R

PS: for now, I can still work in the notebook and set use_latex to True, 
though.

El martes, 20 de agosto de 2013 19:21:04 UTC-4, Aaron Meurer escribió:
>
> What version of Python are you using? I just found a bug that prevents 
> the png formatter from working in Python 3 (which is fixed at 
> https://github.com/sympy/sympy/pull/2398). 
>
> I just pushed a branch that adds some debug calls, if you want to try 
> it out. To use it, you have to set the SYMPY_DEBUG environment 
> variable to "1" (you can do this from within Python by calling 
>
> import os 
> os.environ['SYMPY_DEBUG'] = '1' 
>
> before importing sympy (doing it before you import sympy is important, 
> because sympy checks this at import time). 
>
> Let me know if you want help in getting the code from the pull 
> request. I would just build a conda package for you, but I don't have 
> access to a Windows machine to build it on. 
>
> Aaron Meurer 
>
> On Tue, Aug 20, 2013 at 4:36 PM, Ricardo Mayer 
> <[email protected]<javascript:>> 
> wrote: 
> > Thanks! 
> > 
> > I'm in Windows 7 64bit and I'm starting the qtconsole and the notebook 
> from 
> > Anaconda's Launcher program. 
> > 
> > I did a conda install -f sympy and conda install -f ipython. 
> > 
> > Mmmm after it, I still have the same problem with the ipython qtconsole 
> > (even after setting use_latex to 'png', 'matplotlib', or 'mathjax' or 
> True) 
> > (could it be a problem with 'untested Qt 6.2'?) 
> > 
> > But .... it's *different* in the notebook: init_printing() now gives 
> correct 
> > latex rendering and if I set  use_latex to 'png', 'matplotlib', or 
> 'mathjax' 
> > then I'm back to the ugly display (sorry, ascii). 
> > 
> > R 
> > 
> > 
> > 
> > 
> > On Tue, Aug 20, 2013 at 6:19 PM, Aaron Meurer 
> > <[email protected]<javascript:>> 
> wrote: 
> >> 
> >> This is a bug then. I can't reproduce it. It's possible that your 
> >> installation is broken. You can try conda install -f sympy and conda 
> >> install -f ipython. 
> >> 
> >> This is the code that automatically enables latex in the notebook 
> >> 
> >> 
> https://github.com/sympy/sympy/blob/master/sympy/interactive/printing.py#L278.
>  
>
> >> It seems like it should work. 
> >> 
> >> What operating system are you on? How are you starting the IPython 
> >> notebook? 
> >> 
> >> Also, what happens if you set use_latex to 'png', 'matplotlib', or 
> >> 'mathjax'. 
> >> 
> >> We should enable debugging here. 
> >> 
> >> Aaron Meurer 
> >> 
> >> On Tue, Aug 20, 2013 at 3:57 PM, Ricardo Mayer 
> >> <[email protected]<javascript:>> 
>
> >> wrote: 
> >> > Yes, I'm sure  ... or at least 'conda search sympy'  says so :-) 
> >> > 
> >> > Oh, BTW, I'm using Ipython 1.0.0   (and sympy 0.7.3) 
> >> > 
> >> > I tried ipython 0.13.2 with sympy 0.7..2  and the problem does *not* 
> >> > occur 
> >> > 
> >> > 
> >> > 
> >> > El martes, 20 de agosto de 2013 17:11:09 UTC-4, Aaron Meurer 
> escribió: 
> >> >> 
> >> >> That's a bug then. Are you sure you are using SymPy 0.7.3? There 
> were 
> >> >> some 
> >> >> issues with this in the previous version. 
> >> >> 
> >> >> Aaron Meurer 
> >> >> 
> >> >> 
> >> >> On Tuesday, August 20, 2013, Ricardo Mayer wrote: 
> >> >>> 
> >> >>> Thank you, Aaron. 
> >> >>> 
> >> >>> I did tried it ipython (notebook and qt console) and calling 
> >> >>> init_printing() there does not enable latex (formulas were rendered 
> in 
> >> >>> ascii 
> >> >>> characters). I had to pass the argument 'use_latex=True' 
> explicitly. 
> >> >>> 
> >> >>> 
> >> >>> 
> >> >>> El martes, 20 de agosto de 2013 14:21:02 UTC-4, Aaron Meurer 
> escribió: 
> >> >>>> 
> >> >>>> The default is to use latex, but only in environments that support 
> >> >>>> it, 
> >> >>>> namely the IPython notebook or the ipython qtconsole of you have 
> >> >>>> latex or 
> >> >>>> matplotlib installed. See the printing section of the tutorial. 
> >> >>>> 
> >> >>>> If it's not enabling latex for you in those environments, that's a 
> >> >>>> bug. 
> >> >>>> 
> >> >>>> Aaron Meurer 
> >> >>>> 
> >> >>>> On Aug 20, 2013, at 8:07 AM, Ricardo Mayer <[email protected]> 
> >> >>>> wrote: 
> >> >>>> 
> >> >>>> Dear all, 
> >> >>>> 
> >> >>>>    is it just me or it seems that init_printing() does NOT invoke 
> >> >>>> use_latex=True by default? It apparently causes not-so-pretty 
> ascii 
> >> >>>> output 
> >> >>>> to appear in the documentation, as in 
> >> >>>> 
> >> >>>>  http://docs.sympy.org/0.7.3/tutorial/intro.html 
> >> >>>> 
> >> >>>> Maybe that page should be change to replace calls of 
> init_printing() 
> >> >>>> with init_printing(use_latex=True) ? (or maybe change the current 
> >> >>>> default 
> >> >>>> behaviour of init_printing) 
> >> >>>> 
> >> >>>> thanks, 
> >> >>>> R 
> >> >>>> 
> >> >>>> -- 
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