How to create your own snippets

In VS Code, you can create your own language-specific snippets by following this demo on the official docs!

Here are some of my own snippets for LaTeX and Python.

LaTeX

My latex.json file:

{   // ! <-------------------- Start OF SNIPPETS --------------------
	// Place your snippets for latex here. Each snippet is defined under a snippet name and has a prefix, body and 
	// description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. 
	// Possible variables are:
	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. 
	// Placeholders with the same ids are connected.
	// Example:
	// "Print to console": {
	// 	"prefix": "log",
	// 	"body": [
	// 		"console.log('$1');",
	// 		"$2"
	// 	],
	// 	"description": "Log output to console"
	// }

// ---------------------------- Beamer Specific ----------------------------
	// frame
	"Begin frame":{
		"prefix":"bfr",
		"body":["\\begin{frame}\\frametitle{$1}\n\t$0\n\\end{frame}"]
	},

	// block
	"Block":{
		"prefix":"bbl",
		"body":["\\begin{block}{$1}\n\t$0\n\\end{block}"]
	},

	// exclude page from count
	"Exclude page from count":{
		"prefix":"excl",
		"body":["\\excludefromcount"]
	},

// ---------------------------- Beging{} Snippets ----------------------------
	// Begin
	"Begin":{
		"prefix":"beg",
		"body":["\\begin{$1}\n\t$0\n\\end{$1}"]
	},

	// Example
	"Begin Example":{
		"prefix":"bex",
		"body":["\\begin{example}\n\t$0\n\\end{example}"]
	},

	// Theorem
	"Begin Theorem":{
		"prefix":"bthm",
		"body":["\\begin{theorem}\n\t$0\n\\end{theorem}"]
	},

	// Lemma
	"Begin Lemma":{
		"prefix":"blem",
		"body":["\\begin{lemma}\n\t$0\n\\end{lemma}"]
	},

	// Proof
	"Begin Proof":{
		"prefix":"bproof",
		"body":["\\begin{proof}\n\t$0\n\\end{proof}"]
	},

	// Equations
	"Begin Equation":{
		"prefix":"eq",
		"body":["\\begin{equation}\n\t$0\n\\end{equation}"]
	},

	// Align
	"Begin Align":{
		"prefix":"balign",
		"body":["\\begin{align}\n\t$0\n\\end{align}"]
	},

	// Split
	"Begin Split":{
		"prefix":"bsplit",
		"body":["\\begin{split}\n\t$0\n\\end{split}"]
	},

	// Equations No number
	"Begin Equation no numbering":{
		"prefix":"beq*",
		"body":["\\begin{equation*}\n\t$0\n\\end{equation*}"]
	},

	// Align No number
	"Begin Align no numbering":{
		"prefix":"balign*",
		"body":["\\begin{align*}\n\t$0\n\\end{align*}"]
	},

	// Split No number
	"Begin Split no numbering":{
		"prefix":"bsplit*",
		"body":["\\begin{split*}\n\t$0\n\\end{split*}"]
	},

	// Itemize
	"Begin Itemize":{
		"prefix":"bitem",
		"body":["\\begin{itemize}\n\t\\item{%\n\t\t$0\n\t}%\n\\end{itemize}"]
	},

	// Enumerate
	"Begin enumerate with 1, 2, 3, ...":{
		"prefix":"benum",
		"body":["\\begin{enumerate}\n\t\\item{%\n\t\t$0\n\t}%\n\\end{enumerate}"]
	},

	// Enumerate with alphabet
	"Begin enumerate with a, b, c, ...":{
		"prefix":"bparts",
		"body":["\\begin{enumerate}[label=(\\alph*)]\n\t\\item {\n\t\t$0\n\t}\n\\end{enumerate}"]
	},

	// bmatrix
	"Begin bmatrix":{
		"prefix":"bmat",
		"body":["\\begin{bmatrix}\n\t$0\n\\end{bmatrix}"]
	},

	// Columns
	"Begin Columns":{
		"prefix":"bcs",
		"body":["\\begin{columns}\n\t$0\n\\end{columns}"]
	},

	// Column
	"Begin Column":{
		"prefix":"bc",
		"body":["\\begin{column}{0.5\\textwidth}\n\t$0\n\\end{column}"]
	},

	// Figure
	"Begin Figure":{
		"prefix":"bf",
		"body":[
			"\\begin{figure}",
			"\t\\centering",
			"\t\\includegraphics{Figures/$1}",
			"\t\\vspace{-10pt}",
			"\t\\caption{$2}",
			"\t\\label{fig:$3}",
			"\t\\vspace{-10pt}",
			"\\end{figure}"
		]
	},

	// Rebuttal Comment and Response (REQUIRES Rebuttal Package)
	"Begin Rebuttal":{
		"prefix":"brb",
		"body":[
			"\\begin{rebuttal}",
			"\t% Comment",
			"\t{%",
			"\t}%",
			"\t% Response",
			"\t{%",
			"\t}%",
			"\\end{rebuttal}",
			"% -------------------------------------------------------------------------------------------- %"
		]
	},

// ---------------------------- \Left \Right Snippets ----------------------------
	// Norms \left| \right| (REQUIRES mleftright package)
	"Norm":{
		"prefix":"norm",
		"body":["\\mleft\\| $0 \\mright\\| "]
	},

	// Absolute value \left| \right|
	"Absolute value":{
		"prefix":"abs",
		"body":["\\lvert $0 \\rvert "]
	},

	// Brackets, parentheses, and sets \left( \right), \left[ \right], and \left\{ \right]\}
	// (REQUIRES mleftright package)
	"()":{
		"prefix":"pren",
		"body":["\\mleft( $0 \\mright) "]
	},

	"[]":{
		"prefix":"brac",
		"body":["\\mleft[ $0 \\mright] "]
	},

	"{}":{
		"prefix":"cbrac",
		"body":["\\mleft\\{ $0 \\mright\\\\} "]
	},

	// Inner produt \left< \right>
	"<>":{
		"prefix":"inp",
		"body":["\\left\\langle $0 \\right\\rangle "]
	},

	// Inline Math mode USING \( \)
	"Inline mathmode":{
		"prefix":"\\(",
		"body":["\\($0\\) "]
	},

// ---------------------------- {}{} Snippets ----------------------------
	// Fraction \frac{}{}
	"fraction":{
		"prefix":"frac",
		"body":["\\frac{$1}{$2} $0"]
	},

	// Sub/Super scripts
	"sub/super Scripts":{
		"prefix":"__",
		"body":["$1_{$2}^{$3} $0"]
	},

	// Summation \sum_{min}^{max}
	"summation":{
		"prefix":"sum",
		"body":["\\sum_{${1:i}=${2:0}}^{${3:n}} $0"]
	},

	// Integration \int{min}^{max}
	"integration":{
		"prefix":"int",
		"body":["\\int_{${1:0}}^{${2:n}} $0 \\, \\d${3:t}"]
	},

// ---------------------------- Text Snippets ----------------------------
	// Bolding Text \textbf{}
	"textbf":{
		"prefix":"tbf",
		"body":["\\textbf{$1}$0"]
	},

	// Bolding Math (DECAR Specfic \mbf)
	"mbf":{
		"prefix":"mbf",
		"body":["\\mbf{${1:0}} $0"]
	},

	// Shortcut for "positive definite"
	"positive definite":{
		"prefix":"pd",
		"body":["positive definite "]
	},

	// Shortcut for text roman
	"text roman":{
		"prefix":"trm",
		"body":["\\textrm{$1} $0"]
	},

// ---------------------------- References and Lables ----------------------------
	// Referencing (REQUIRES cleveref package)
	"cref":{
		"prefix":"ref",
		"body":["\\cref{$0} "]
	},

	// Referencing Figures/Theorems/... (REQUIRES cleveref package)
	"Cref":{
		"prefix":"fref",
		"body":["\\Cref{$0} "]
	},

	// Cite
	"cite":{
		"prefix":"cite",
		"body":["\\cite{$0} "]
	},

	// Cite small and red for beamer
	"cite beamer style":{
		"prefix":"scite",
		"body":["{\\small\\textcolor{decar_red_bright}{[$1, $2]}}$0"]
	},

	// Cite with name
	"cite with name":{
		"prefix":"fcite",
		"body":["\\cite[$1]{$0} "]
	},

	// Label
	"label":{
		"prefix":"lbl",
		"body":["\\label{${1|eqn:,sec:,fig:,subsec:|}$0}"]
	},

// ---------------------------- Sections ----------------------------
	// Section
	"section":{
		"prefix":"sec",
		"body":["\\section{$1}\n$0"]
	},

	// Subsection
	"subsection":{
		"prefix":"sub",
		"body":["\\subsection{$1}\n$0"]
	},

	// Subsubsection
	"subsubsection":{
		"prefix":"subsub",
		"body":["\\subsubsection{$1}\n$0"]
	},

// ---------------------------- Math Sets ----------------------------
	// l_{2e} 
	"set of l_2e":{
		"prefix":"ll2e",
		"body":["\\ell_{2e}"]
	},

	// L_{2e} 
	"set of L_2e":{
		"prefix":"l2e",
		"body":["\\mathcal{L}_{2e}"]
	},

	// Real 
	"set of real numbers":{
		"prefix":"sr",
		"body":["\\mathbb{R}^{$1}$0"]
	},

	// Real <=
	"set of real numbers <= 0":{
		"prefix":"srne",
		"body":["\\mathbb{R}_{\\leq0}$0"]
	},

	// Real < 0
	"set of real numbers < 0":{
		"prefix":"srne",
		"body":["\\mathbb{R}_{<0}$0"]
	},

	// Real >= 0
	"set of real numbers >= 0":{
		"prefix":"srpe",
		"body":["\\mathbb{R}_{\\geq0}$0"]
	},

	// Real > 0
	"set of real numbers > 0":{
		"prefix":"srp",
		"body":["\\mathbb{R}_{>0}$0"]
	},

	// Integer >= 0
	"set of nonnegative integers >= 0":{
		"prefix":"sip",
		"body":["\\mathbb{Z}_{\\geq0}$0"]
	},

	// Symmetric Real matrix 
	"set of symmetric Real":{
		"prefix":"sm",
		"body":["\\mathbb{S}^{$1}$0"]
	},

	// Symmetric Real Negative semidefinite
	"set of symmetric real matrices <= 0":{
		"prefix":"snsd",
		"body":["\\mathbb{S}_{-}^{$1}$0"]
	},

	// Symmetric Real Negative definite
	"set of symmetric real matricess < 0":{
		"prefix":"snd",
		"body":["\\mathbb{S}_{--}^{$1}$0"]
	},

	// Symmetric Real Positive semidefinite
	"set of symmetric real matrices >= 0":{
		"prefix":"spsd",
		"body":["\\mathbb{S}_{+}^{$1}$0"]
	},

	// Symmetric Real Positive definite
	"set of symmetric real matrices > 0":{
		"prefix":"spd",
		"body":["\\mathbb{S}_{++}^{$1}$0"]
	},

	// Mathcal
	"Matchcal{}":{
		"prefix":"mc",
		"body":["\\mathcal{$1} $0"]
	},
// ---------------------------- Math Symbols ----------------------------
	// Transpose using \ensuremath{\mathsf{T}}
	"transpose":{
		"prefix":"trans",
		"body":["^{\\trans} "]
	},
	
	// Gradient using \nabla
	"gradient":{
		"prefix":"nabla",
		"body":["\\nabla "]
	},

	// Less than equal \leq
	"leq":{
		"prefix":"leq",
		"body":["\\leq "]
	},

	// Greater than equal \geq
	"geq":{
		"prefix":"geq",
		"body":["\\geq "]
	},

	// Less than equal MATRIX wise \preceq
	"preceq":{
		"prefix":"eprec",
		"body":["\\preceq "]
	},

	// Greater than equal MATRIX wise \succeq
	"succeq":{
		"prefix":"esucc",
		"body":["\\succeq "]
	},

	// Less MATRIX wise \preceq
	"prec":{
		"prefix":"prec",
		"body":["\\prec "]
	},

	// Greater MATRIX wise \succeq
	"succ":{
		"prefix":"succ",
		"body":["\\succ "]
	},

// ---------------------------- Math Equations ----------------------------
	"A^T P A":{
		"prefix":"A'PA",
		"body":["${1:\\mbf{A\\}}^{\\trans} ${2:\\mbf{P\\}} ${1:\\mbf{A\\}} $0"]
	},

	"f(x_k)":{
		"prefix":"fx",
		"body":["f(${1:\\mbf{x\\}}${2:_{${3:k}\\}}) $0"]
	},

	"gradient of f(x_k)":{
		"prefix":"gfx",
		"body":["\\nabla f(${1:\\mbf{x\\}}${2:_{${3:k}\\}}) $0"]
	},

// ---------------------------- MYSC ----------------------------
	// Text color blue
	"Text color blue":{
		"prefix":"tcb",
		"body":["\\textcolor{blue}{"]
	},
	// Text color magenta
	"Text color magenta":{
		"prefix":"tcm",
		"body":["\\textcolor{magenta}{"]
	},
	
	// No numbering
	"no numbering":{
		"prefix":"nonum",
		"body":["\\nonumber\n\\\\\\%\n"]
	},

	// item
	"item":{
		"prefix":"item",
		"body":["\\item{%\n\t$0\n}%\n"]
	},

	// Section Section Divider
	"Section Divider":{
		"prefix":"secdiv",
		"body":["% ****************************************************************************************************************** %",
				"% ************************************************ $0 ******************************************************** %",
				"% ****************************************************************************************************************** %"]
	},

	// Sub Section Section Divider
	"Sub Section Divider":{
		"prefix":"subdiv",
		"body":["% ************************************************ $0 ******************************************************** %",]
	},

	// QED
	"QED":{
		"prefix":"qed",
		"body":["\\hspace*{\\fill}~\\QED\\par\\endtrivlist\\unskip"]
	},

	//quad
	"quad":{
		"prefix":"qd",
		"body":["\\quad "]
	},

	// vspace
	"vspace":{
		"prefix":"vs",
		"body":["\\vspace{$1pt}$0"]
	},

	// hspace
	"hspace":{
		"prefix":"hs",
		"body":["\\hspace{$1pt}$0"]
	},

// ---------------------------- Greek Letters ----------------------------
	// Greek Letters
	// \alpha, \beta, \delta, \gamma, \lambda, \xi, \rho, \epsilon
	"alpha":{
		"prefix":"alpha",
		"body":["\\alpha "]
	},

	"beta":{
		"prefix":"beta",
		"body":["\\beta "]
	},

	"delta":{
		"prefix":"delta",
		"body":["\\delta "]
	},
	
	"gamma":{
		"prefix":"gamma",
		"body":["\\gamma "]
	},

	"lambda":{
		"prefix":"lambda",
		"body":["\\lambda "]
	},

	"xi":{
		"prefix":"xi",
		"body":["\\xi "]
	},

	"rho":{
		"prefix":"rho",
		"body":["\\rho "]
	},

	"epsilon": {
		"prefix": "eps",
		"body": ["\\varepsilon "],
	},

// ---------------------------- Matrix and Vector Notation ----------------------------
	// \mbf{} snippets for Alphabet (DECAR Specific)
	"Math Bold A":{"prefix":"A","body":["\\mbf{A}"]},
	"Math Bold a":{"prefix":"aa","body":["\\mbf{a}"]},
	"Math Bold B":{"prefix":"B","body":["\\mbf{B}"]},
	"Math Bold b":{"prefix":"bb","body":["\\mbf{b}"]},
	"Math Bold C":{"prefix":"C","body":["\\mbf{C}"]},
	"Math Bold c":{"prefix":"cc","body":["\\mbf{c}"]},
	"Math Bold D":{"prefix":"D","body":["\\mbf{D}"]},
	"Math Bold d":{"prefix":"dd","body":["\\mbf{d}"]},
	"Math Bold E":{"prefix":"E","body":["\\mbf{E}"]},
	"Math Bold e":{"prefix":"ee","body":["\\mbf{e}"]},
	"Math Bold F":{"prefix":"F","body":["\\mbf{F}"]},
	"Math Bold f":{"prefix":"ff","body":["\\mbf{f}"]},
	"Math Bold G":{"prefix":"G","body":["\\mbf{G}"]},
	"Math Bold g":{"prefix":"gg","body":["\\mbf{g}"]},
	"Math Bold H":{"prefix":"H","body":["\\mbf{H}"]},
	"Math Bold h":{"prefix":"hh","body":["\\mbf{h}"]},
	"Math Bold I":{"prefix":"I","body":["\\mbf{I}"]},
	"Math Bold i":{"prefix":"ii","body":["\\mbf{i}"]},
	"Math Bold J":{"prefix":"J","body":["\\mbf{J}"]},
	"Math Bold j":{"prefix":"jj","body":["\\mbf{j}"]},
	"Math Bold K":{"prefix":"K","body":["\\mbf{K}"]},
	"Math Bold k":{"prefix":"kk","body":["\\mbf{k}"]},
	"Math Bold L":{"prefix":"L","body":["\\mbf{L}"]},
	"Math Bold l":{"prefix":"ll","body":["\\mbf{l}"]},
	"Math Bold M":{"prefix":"M","body":["\\mbf{M}"]},
	"Math Bold m":{"prefix":"mm","body":["\\mbf{m}"]},
	"Math Bold N":{"prefix":"N","body":["\\mbf{N}"]},
	"Math Bold n":{"prefix":"nn","body":["\\mbf{n}"]},
	"Math Bold O":{"prefix":"O","body":["\\mbf{O}"]},
	"Math Bold o":{"prefix":"oo","body":["\\mbf{o}"]},
	"Math Bold P":{"prefix":"P","body":["\\mbf{P}"]},
	"Math Bold p":{"prefix":"pp","body":["\\mbf{p}"]},
	"Math Bold Q":{"prefix":"Q","body":["\\mbf{Q}"]},
	"Math Bold q":{"prefix":"qq","body":["\\mbf{q}"]},
	"Math Bold R":{"prefix":"R","body":["\\mbf{R}"]},
	"Math Bold r":{"prefix":"rr","body":["\\mbf{r}"]},
	"Math Bold S":{"prefix":"S","body":["\\mbf{S}"]},
	"Math Bold s":{"prefix":"ss","body":["\\mbf{s}"]},
	"Math Bold T":{"prefix":"T","body":["\\mbf{T}"]},
	"Math Bold t":{"prefix":"tt","body":["\\mbf{t}"]},
	"Math Bold U":{"prefix":"U","body":["\\mbf{U}"]},
	"Math Bold u":{"prefix":"uu","body":["\\mbf{u}"]},
	"Math Bold V":{"prefix":"V","body":["\\mbf{V}"]},
	"Math Bold v":{"prefix":"vv","body":["\\mbf{v}"]},
	"Math Bold W":{"prefix":"W","body":["\\mbf{W}"]},
	"Math Bold w":{"prefix":"ww","body":["\\mbf{w}"]},
	"Math Bold X":{"prefix":"X","body":["\\mbf{X}"]},
	"Math Bold x":{"prefix":"xx","body":["\\mbf{x}"]},
	"Math Bold Y":{"prefix":"Y","body":["\\mbf{Y}"]},
	"Math Bold y":{"prefix":"yy","body":["\\mbf{y}"]},
	"Math Bold Z":{"prefix":"Z","body":["\\mbf{Z}"]},
	"Math Bold z":{"prefix":"zz","body":["\\mbf{z}"]},

	// \mbs{} snippets for  Greek Alphabet
	"Math Bold Phi ":{"prefix":"Phi","body":["\\mbs{\\Phi}"]},

	// \mbf{} snippets for Alphabet + sub + super scripts
	"Math Bold A with sub/sup":{"prefix":"A_","body":["\\mbf{A}_{$1}^{$2} "]},
	"Math Bold a with sub/sup":{"prefix":"aa_","body":["\\mbf{a}_{$1}^{$2} "]},
	"Math Bold B with sub/sup":{"prefix":"B_","body":["\\mbf{B}_{$1}^{$2} "]},
	"Math Bold b with sub/sup":{"prefix":"bb_","body":["\\mbf{b}_{$1}^{$2} "]},
	"Math Bold C with sub/sup":{"prefix":"C_","body":["\\mbf{C}_{$1}^{$2} "]},
	"Math Bold c with sub/sup":{"prefix":"cc_","body":["\\mbf{c}_{$1}^{$2} "]},
	"Math Bold D with sub/sup":{"prefix":"D_","body":["\\mbf{D}_{$1}^{$2} "]},
	"Math Bold d with sub/sup":{"prefix":"dd_","body":["\\mbf{d}_{$1}^{$2} "]},
	"Math Bold E with sub/sup":{"prefix":"E_","body":["\\mbf{E}_{$1}^{$2} "]},
	"Math Bold e with sub/sup":{"prefix":"ee_","body":["\\mbf{e}_{$1}^{$2} "]},
	"Math Bold F with sub/sup":{"prefix":"F_","body":["\\mbf{F}_{$1}^{$2} "]},
	"Math Bold f with sub/sup":{"prefix":"ff_","body":["\\mbf{f}_{$1}^{$2} "]},
	"Math Bold G with sub/sup":{"prefix":"G_","body":["\\mbf{G}_{$1}^{$2} "]},
	"Math Bold g with sub/sup":{"prefix":"gg_","body":["\\mbf{g}_{$1}^{$2} "]},
	"Math Bold H with sub/sup":{"prefix":"H_","body":["\\mbf{H}_{$1}^{$2} "]},
	"Math Bold h with sub/sup":{"prefix":"hh_","body":["\\mbf{h}_{$1}^{$2} "]},
	"Math Bold I with sub/sup":{"prefix":"I_","body":["\\mbf{I}_{$1}^{$2} "]},
	"Math Bold i with sub/sup":{"prefix":"ii_","body":["\\mbf{i}_{$1}^{$2} "]},
	"Math Bold J with sub/sup":{"prefix":"J_","body":["\\mbf{J}_{$1}^{$2} "]},
	"Math Bold j with sub/sup":{"prefix":"jj_","body":["\\mbf{j}_{$1}^{$2} "]},
	"Math Bold K with sub/sup":{"prefix":"K_","body":["\\mbf{K}_{$1}^{$2} "]},
	"Math Bold k with sub/sup":{"prefix":"kk_","body":["\\mbf{k}_{$1}^{$2} "]},
	"Math Bold L with sub/sup":{"prefix":"L_","body":["\\mbf{L}_{$1}^{$2} "]},
	"Math Bold l with sub/sup":{"prefix":"ll_","body":["\\mbf{l}_{$1}^{$2} "]},
	"Math Bold M with sub/sup":{"prefix":"M_","body":["\\mbf{M}_{$1}^{$2} "]},
	"Math Bold m with sub/sup":{"prefix":"mm_","body":["\\mbf{m}_{$1}^{$2} "]},
	"Math Bold N with sub/sup":{"prefix":"N_","body":["\\mbf{N}_{$1}^{$2} "]},
	"Math Bold n with sub/sup":{"prefix":"nn_","body":["\\mbf{n}_{$1}^{$2} "]},
	"Math Bold O with sub/sup":{"prefix":"O_","body":["\\mbf{O}_{$1}^{$2} "]},
	"Math Bold o with sub/sup":{"prefix":"oo_","body":["\\mbf{o}_{$1}^{$2} "]},
	"Math Bold P with sub/sup":{"prefix":"P_","body":["\\mbf{P}_{$1}^{$2} "]},
	"Math Bold p with sub/sup":{"prefix":"pp_","body":["\\mbf{p}_{$1}^{$2} "]},
	"Math Bold Q with sub/sup":{"prefix":"Q_","body":["\\mbf{Q}_{$1}^{$2} "]},
	"Math Bold q with sub/sup":{"prefix":"qq_","body":["\\mbf{q}_{$1}^{$2} "]},
	"Math Bold R with sub/sup":{"prefix":"R_","body":["\\mbf{R}_{$1}^{$2} "]},
	"Math Bold r with sub/sup":{"prefix":"rr_","body":["\\mbf{r}_{$1}^{$2} "]},
	"Math Bold S with sub/sup":{"prefix":"S_","body":["\\mbf{S}_{$1}^{$2} "]},
	"Math Bold s with sub/sup":{"prefix":"ss_","body":["\\mbf{s}_{$1}^{$2} "]},
	"Math Bold T with sub/sup":{"prefix":"T_","body":["\\mbf{T}_{$1}^{$2} "]},
	"Math Bold t with sub/sup":{"prefix":"tt_","body":["\\mbf{t}_{$1}^{$2} "]},
	"Math Bold U with sub/sup":{"prefix":"U_","body":["\\mbf{U}_{$1}^{$2} "]},
	"Math Bold u with sub/sup":{"prefix":"uu_","body":["\\mbf{u}_{$1}^{$2} "]},
	"Math Bold V with sub/sup":{"prefix":"V_","body":["\\mbf{V}_{$1}^{$2} "]},
	"Math Bold v with sub/sup":{"prefix":"vv_","body":["\\mbf{v}_{$1}^{$2} "]},
	"Math Bold W with sub/sup":{"prefix":"W_","body":["\\mbf{W}_{$1}^{$2} "]},
	"Math Bold w with sub/sup":{"prefix":"ww_","body":["\\mbf{w}_{$1}^{$2} "]},
	"Math Bold X with sub/sup":{"prefix":"X_","body":["\\mbf{X}_{$1}^{$2} "]},
	"Math Bold x with sub/sup":{"prefix":"xx_","body":["\\mbf{x}_{$1}^{$2} "]},
	"Math Bold Y with sub/sup":{"prefix":"Y_","body":["\\mbf{Y}_{$1}^{$2} "]},
	"Math Bold y with sub/sup":{"prefix":"yy_","body":["\\mbf{y}_{$1}^{$2} "]},
	"Math Bold Z with sub/sup":{"prefix":"Z_","body":["\\mbf{Z}_{$1}^{$2} "]},
	"Math Bold z with sub/sup":{"prefix":"zz_","body":["\\mbf{z}_{$1}^{$2} "]},

	// \mbs{} snippets for  Greek Alphabet
	"Math Bold Phi with sub/sup":{"prefix":"Phi_","body":["\\mbs{\\Phi}_{$1}^{$2} "]},
}  // ! <-------------------- END OF SNIPPETS --------------------

Python

My python.json file:

{
  "python DEBUG msg": {
    "prefix": "debug",
    "body": [
      "#! <--------------------- DEBUG: $0",
    ],
    "description": "python Main"
  },

  // Plot
  "python plot": {
    "prefix": "myplt",
    "body": [
      "plt.figure(figsize=(15,8))",
      "plt.plot($1, $2, c='r', ls='-', label=r'$3')",
      "plt.xlabel(r'$4'); plt.ylabel(r'$5')",
      "plt.title(r'$6')",
      "plt.legend(bbox_to_anchor=(1, 1))",
      "$0",
    ],
    "description": "python Main"
  },
  
  // Subplot
  "python subplot": {
    "prefix": "mysubplt",
    "body": [
      "fig, axs = plt.subplots(2, sharex=True, figsize=(15,8))",
      "axs[0].plot($1, $2, c='r', ls='-', label=r'$3')",
      "axs[1].plot($4, $5, c='r', ls='-', label=r'$6)",
      "fig.suptitle(r'$7')",
      "axs[0].set_xscale('log')",
      "plt.legend(bbox_to_anchor=(1, 1))",
    ],
    "description": "python Main"
  },

  // Function
  "python function": {
    "prefix": "myfun",
    "body": [
      "# Purpose: $1", 
      "def $2(${3:self}, $4)${5: -> None}:",
      "    $0",
    ],
    "description": "python function template"
  },

  // Class
  "python class": {
    "prefix": "myclass",
    "body": [
      "class $1():",
      "    def __init__(self, $2) -> None:",
      "        $0",
    ],
    "description": "python class template"
  },

  // Numpy array
  "python np.array": {
    "prefix": "arr",
    "body": [
    "np.array([$0])"
    ],
    "description": "python np.array"
  },

  // printf
  "python printf": {
      "prefix": "pf",
      "body": [
      "print(f'$0')"
      ],
      "description": "python print formatted"
  },

  // Numpy array 2 by 2
  "python np.array2 by 2": {
    "prefix": "arr2",
    "body": [
    "np.array([[$1, $2],",
    "          [$3, $4]])$0"
    ],
    "description": "python np.array 2by2"
  },

  // Numpy array 3 by 3
    "python np.array3 by 3": {
    "prefix": "arr3",
    "body": [
    "np.array([[$1, $2, $3],",
    "          [$4, $5, $6],",
    "          [$7, $8, $9]])$0"
    ],
    "description": "python np.array 3by3"
  },

 // Test function 
    "python test function": {
      "prefix": "test",
      "body": [
      "def testing():",
      "\tprint(f'{\"Begin Testing\":=^{50}}')",
      "\t$0",
      "\tprint(f'{\"End Testing\":=^{50}}')",
      "\tpass",
      ],
      "description": "python test function"
  }
}