Note_template.tex

\documentclass[12pt]{article}

\input{code_preamble.tex}
\input{general_preamble.tex}

\title{Note template}
\author{Your name}

\begin{document}
\maketitle
\pagestyle{fancy}
\tableofcontents
\newpage
\chead{head}

\section*{section}
text.
\newline
text.
\subsection{subsection}
\begin{python}
    type your code here
\end{python}
    Descriptions
\subsection{subsection}
\[
    math\ equations
\]
Descriptions
\section*{Your theme}
Descriptions
\subsection{subsection}
%begin{figure}[H]
    %\centering
    %\includegraphics[width = 0.6\textwidth]{.png}
    %\caption{}
%end{figure}
\end{document}