main.tex

\documentclass[11pt]{book}

\usepackage[OT1, T2A]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english, russian]{babel}


\usepackage[newfloat=true]{minted}
\usemintedstyle{bw}
\SetupFloatingEnvironment{listing}{placement=H}

\newminted[python]{python}{}

\usepackage{bold-extra}

\newenvironment{english}{\begin{otherlanguage}{english}}{\end{otherlanguage}}

\begin{document}

\begin{english}
  \begin{python}

from typing import Iterator

# This is an example
class Math:
    @staticmethod
    def fib(n: int) -> Iterator[int]:
        """Fibonacci series up to n."""
        a, b = 0, 1
        while a < n:
            yield a
            a, b = b, a + b

result = sum(Math.fib(42))
print("The answer is {}".format(result))

  \end{python}
\end{english}

\end{document}