Pretty displaying code in beamer

Question

I am currently making my first beamer presentation, so forgive if this is a very trivial question. I have tried to research how to display code on a beamer presentation. I have managed to do this using semiverbatim. However, I am not completely satisfied with this as the readability is so poor without any coloring of keywords, etc. I have tried to use the listings package, with which I am familiar from writing articles in LaTeX, but I have not been successfull.

Here is an example from my presentation:

\begin{frame}[fragile]
\begin{semiverbatim}
class DampenedPendulum(Pendulum):
    def __init__(self, B, L=1, M=1, g=9.81):
        super().__init__(L=1, M=1, g=9.81)
        self.solve_called = False
        self.B = B
\end{semiverbatim}
\end{frame}

This comes out okay, but I would like to improve the readability by adding some coloring of keywords, like in the listings package. Any tips on how to that would be much appreciated.

Here is an example of how I tried to this using the listings package:

\documentclass{beamer}
\usetheme{Boadilla}

\usepackage{listings}
\usepackage{xcolor}
 
\definecolor{codegreen}{rgb}{0,0.6,0}
\definecolor{codegray}{rgb}{0.5,0.5,0.5}
\definecolor{codepurple}{rgb}{0.58,0,0.82}
\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
 
\lstdefinestyle{mystyle}{
    backgroundcolor=\color{backcolour},   
    commentstyle=\color{codegreen},
    keywordstyle=\color{magenta},
    numberstyle=\tiny\color{codegray},
    stringstyle=\color{codepurple},
    basicstyle=\ttfamily\footnotesize,
    breakatwhitespace=false,         
    breaklines=true,                 
    captionpos=b,                    
    keepspaces=true,                 
    numbers=left,                    
    numbersep=5pt,                  
    showspaces=false,                
    showstringspaces=false,
    showtabs=false,                  
    tabsize=2
}

 
\lstset{style=mystyle}

\begin{document}

\begin{frame}[fragile]
\begin{lstlisting}
class DampenedPendulum(Pendulum):
    def __init__(self, B, L=1, M=1, g=9.81):
        super().__init__(L=1, M=1, g=9.81)
        self.solve_called = False
        self.B = B
\end{lstlisting}
\end{frame}

\end{document}

This comes out with numbered lines and background color, but not coloring of keywords. The code for styling was copied from an Overleaf page, and I have used it many times in articles for pretty printing code.