Greek alphabet displayed Python-- drawing

When the module will focus on using Matplotlib drawing, horizontal or vertical axis title if you want to write the Greek alphabet, how to deal with this problem.

1. Matplotlib support LaTex grammar, the input format is: r '$ \ Delta $' # Delta therein corresponding to the Greek letter Δ

    r '$ \ Delta $ rv' # corresponding Δrv

2. LaTex syntax of the Greek alphabet:

Greek lowercase, uppercase form of LaTeX, sources of information: https://blog.csdn.net/xxzhangx/article/details/52778539

Greek lowercase, uppercase	LaTeX form	Greek lowercase, uppercase	LaTeX form
a a	\alpha A	N μ	\ No N
b b	\beta  B	X	\ Xi \ Xi
c    c	\ Line \ Gamma	o   O	o O
d   d	\ Participate \ Delta	p  p	\Pee
e  e   E	\epsilon \varepsilon E	p  p  P	\rho \varrho P
g   Z	\ Zeta	p  S.	\ Sigma \ Sigma
the   H	\ Eta H	t  T	\ Year T
i  i   Th	\theta \vartheta \Theta	U  Y	\upsilon \Upsilon
j  I	\iota I	F  F   F	\ Phi \ varphi \ Africa
Mr.   K	\kappa K	x  X	\ Chi X
l  L.	\lambda \Lambda	y  Y	\ Psi \ Dogs
m  M	\mu M	oh  oh	\ Omega \ Omega