4.14.3 Can you answer these questions?

4.14.3.1 Alternative to psfrag that works with matplotlib / Python?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=427516

Is there an alternative to the psfrag library that works with plots made outside of the MATLAB program? For example, in Python, even if you save a figure with the .eps extension, it is not compatible  ... 
[graphics] [psfrag]
 

asked by Reese Pathak https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=161222 1 vote

4.14.3.2 XeLaTex Change Font on Mac OS X

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=427660

I would like to use multiple fonts in one single article. I already set a main font which is going to be used locally, when giving no extra commands. From other answers, I got to know that I need to 
... 
[fonts] [xetex] [fontspec] [mac]
 

asked by user155860 https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=155860 1 vote

4.14.3.3 Chemfig and tikz: shaded arrow

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=427479

How can I make these arrow shades, for example to blue from white? 
\documentclass{article} 
\usepackage{chemfig} 
\usepackage[version=3]{mhchem} 
\begin{document} 
\begin{figure}[!htb] 
\centering 
... 
[tikz-arrows] [chemfig]
 

asked by user3204810 https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=105478 1 vote