This input works for Python3 and Python2. The png file is created properly 
and bit-for-bit identical for both versions.

On Sunday, July 21, 2013 8:54:06 PM UTC+2, Aaron Meurer wrote:
>
> It might be a bug, or it might be broken somehow on your machine. I 
> can't reproduce this right now because I don't have Python 3 versions 
> of all the libraries needed to run IPython in Python 3. 
>
> Can you see if preview(Integral(sqrt(1/x), x), output='png', 
> viewer='file', filename='test.png') works for you? It should create a 
> file called test.png in your current directory. 
>
> Aaron Meurer 
>
> On Sun, Jul 21, 2013 at 6:49 AM,  <[email protected] <javascript:>> wrote: 
> > Hi, 
> > 
> > I played around with sympy in the ipython qtconsole and wanted to try 
> out 
> > LaTeX pretty printing. I noticed that sympy does not produce pretty 
> LaTeX 
> > formatted output when run with Python3. Python2 works perfectly: 
> > 
> > ------------------------------------------------ 
> > 
> > Python 3.3.2 (default, May 21 2013, 15:40:45) 
> > *** snip *** 
> > IPython 0.13.2 -- An enhanced Interactive Python. 
> > *** snip *** 
> > 
> > In [1]: from sympy import init_session 
> > 
> > In [2]: init_session(quiet=True, use_latex=True) 
> > IPython console for SymPy 0.7.3 (Python 3.3.2-64-bit) (ground types: 
> python) 
> > 
> > In [3]: init_printing(use_latex=True) 
> > 
> > In [4]: Integral(sqrt(1/x),x) 
> > 
> > Out[4]: 
> > ⌠ 
> > ⎮     ___ 
> > ⎮    ╱ 1 
> > ⎮   ╱  ─  dx 
> > ⎮ ╲╱   x 
> > ⌡ 
> > 
> > ------------------------------------------------ 
> > 
> > Python 2.7.5 (default, May 12 2013, 12:00:47) 
> > *** snip *** 
> > IPython 0.13.2 -- An enhanced Interactive Python. 
> > *** snip *** 
> > 
> > In [1]: from sympy import init_session 
> > 
> > In [2]: init_session(quiet=True, use_latex=True) 
> > IPython console for SymPy 0.7.3 (Python 2.7.5-64-bit) (ground types: 
> python) 
> > 
> > In [3]: init_printing(use_latex=True) 
> > 
> > In [4]: Integral(sqrt(1/x),x) 
> > 
> > Out[4]: *** Beautiful LaTeX output *** 
> > 
> > ------------------------------------------------ 
> > 
> > Installed packages (Arch Linux): 
> >     ipython 0.13.2-1 
> >     ipython2 0.13.2-2 
> > 
> >     python 3.3.2-1 
> >     python-beaker 1.6.4-1 
> >     python-cairo 1.10.0-2 
> >     python-dbus 1.2.0-1 
> >     python-dbus-common 1.2.0-1 
> >     python-distribute 0.6.45-1 
> >     python-gobject 3.8.3-1 
> >     python-gobject2 2.28.6-9 
> >     python-mako 0.8.1-1 
> >     python-markupsafe 0.18-1 
> >     python-numexpr 2.1-1 
> >     python-numpy 1.7.1-1 
> >     python-pygments 1.6-1 
> >     python-pyqt4 4.10.2-2 
> >     python-pytables 3.0.0-3 
> >     python-pyudev 0.16.1-2 
> >     python-pyzmq 13.1.0-1 
> >     python-requests 1.2.3-2 
> >     python-scipy 0.12.0-1 
> >     python-sip 4.14.7-1 
> >     python-sympy 0.7.3-1 
> >     python-urwid 1.1.1-1 
> >     python-xdg 0.25-1 
> > 
> >     python2 2.7.5-1 
> >     python2-apptools 4.2.0-1 
> >     python2-beaker 1.6.4-1 
> >     python2-cairo 1.10.0-1 
> >     python2-configobj 4.7.2-6 
> >     python2-dbus 1.2.0-1 
> >     python2-distribute 0.6.45-1 
> >     python2-envisage 4.3.0-1 
> >     python2-gobject 3.8.3-1 
> >     python2-gobject2 2.28.6-9 
> >     python2-mako 0.8.1-1 
> >     python2-markupsafe 0.18-1 
> >     python2-notify 0.1.1-12 
> >     python2-numexpr 2.1-1 
> >     python2-numpy 1.7.1-1 
> >     python2-pycurl 7.19.0-2 
> >     python2-pyface 4.3.0-1 
> >     python2-pygments 1.6-1 
> >     python2-pyqt4 4.10.2-2 
> >     python2-pytables 3.0.0-3 
> >     python2-pyudev 0.16.1-2 
> >     python2-pyzmq 13.1.0-1 
> >     python2-sip 4.14.7-1 
> >     python2-sympy 0.7.3-1 
> >     python2-traits 4.3.0-1 
> >     python2-traitsui 4.3.0-1 
> >     python2-urwid 1.1.1-1 
> > 
> > ------------------------------------------------ 
> > 
> > Is this a known problem (a Google search didn't turn up anything)? Am I 
> > missing a package (though I should have all required packages)? Is it 
> maybe 
> > a problem with the Arch Linux package that I should report downstream? 
> > 
> > Thank you in advance, 
> >             Andy 
> > 
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> > 
> > 
>

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