\frametitle{Przykład kodu}
\begin{lstlisting}[style=python-wcag]
		def hello_world():
			print("Hello, Beamer!")
			return None
		def fibonacci(n):
   		 # Return the nth Fibonacci number
			a, b = 0, 1
			for _ in range(n):
				a, b = b, a + b
			return a
		print(fibonacci(10))
	\end{lstlisting}