Latex output from sympy does not correctly display in Google Colaboratory Jupyter notebooks

Question

I am using Google\'s Colaboratory platform to run python in a Jupyter notebook. In standard Jupyter notebooks, the output of sympy functions is correctly typeset Latex, but

Answer 1

You need to include MathJax library before display. Set it up in a cell like this first.

from google.colab.output._publish import javascript
url = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.3/latest.js?config=default"

Later, you include javascript(url=url) before displaying:

x=sp.symbols('x')
a=sp.Integral(sp.sin(x)*sp.exp(x),x)
javascript(url=url)
a

Then, it will display correctly.

Answer 2

Using colab's mathjax and setting the configuration file to TeX-MML-AM_HTMLorMML worked for me. Below is the code:

from sympy          import init_printing
from sympy.printing import latex

def colab_LaTeX_printer(exp, **options):  
    from google.colab.output._publish import javascript 

    url_ = "https://colab.research.google.com/static/mathjax/MathJax.js?"
    cfg_ = "config=TeX-MML-AM_HTMLorMML" # "config=default"

    javascript(url=url_+cfg_)

    return latex(exp, **options)
# end of def

init_printing(use_latex="mathjax", latex_printer=colab_LaTeX_printer) 

Answer 3

I have just made this code snippet to make sympy works like a charm in colab.research.googlr.com !!!

def custom_latex_printer(exp,**options):
    from google.colab.output._publish import javascript
    url = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.3/latest.js?config=default"
    javascript(url=url)
    return sympy.printing.latex(exp,**options)
init_printing(use_latex="mathjax",latex_printer=custom_latex_printer)

Put it after you imported sympy This one basically tell sympy to embed mathjax library using colab api before they actually output any syntax.