Custom lexer no longer worked in my computer. about minted HOT 6 CLOSED

% based on https://github.com/gpoore/minted/issues/176#issuecomment-695344998
\begin{filecontents}[noheader]{my_lexer.py}
from pygments.lexers.markup import TexLexer
from pygments.token import Keyword


class TexLexer2(TexLexer):
    """
    Improved lexer for the TeX and LaTeX typesetting languages.
    Character "@" is treated part of command names.
    """

    TexLexer.tokens['root'][4] = (r'\\([a-zA-Z@]+|.)', Keyword, 'command')
\end{filecontents}

\documentclass{article}
\usepackage{minted}

\makeatletter
\ifwindows
  \renewcommand{\minted@optlistcl@quote}[2]{%
    \ifstrempty{#2}{\detokenize{#1}}{\detokenize{#1="#2"}}}
\else
  \renewcommand{\minted@optlistcl@quote}[2]{%
    \ifstrempty{#2}{\detokenize{#1}}{\detokenize{#1='#2'}}}
\fi

% similar to \minted@def@optcl@switch
\newcommand{\minted@def@optcl@novalue}[2]{%
  \define@booleankey{minted@opt@g}{#1}%
    {\minted@addto@optlistcl{\minted@optlistcl@g}{#2}{}%
     \@namedef{minted@opt@g:#1}{true}}
    {\@namedef{minted@opt@g:#1}{false}}
  \define@booleankey{minted@opt@g@i}{#1}%
    {\minted@addto@optlistcl{\minted@optlistcl@g@i}{#2}{}%
     \@namedef{minted@opt@g@i:#1}{true}}
    {\@namedef{minted@opt@g@i:#1}{false}}
  \define@booleankey{minted@opt@lang}{#1}%
    {\minted@addto@optlistcl@lang{minted@optlistcl@lang\minted@lang}{#2}{}%
     \@namedef{minted@opt@lang\minted@lang:#1}{true}}
    {\@namedef{minted@opt@lang\minted@lang:#1}{false}}
  \define@booleankey{minted@opt@lang@i}{#1}%
    {\minted@addto@optlistcl@lang{minted@optlistcl@lang\minted@lang @i}{#2}{}%
     \@namedef{minted@opt@lang\minted@lang @i:#1}{true}}
    {\@namedef{minted@opt@lang\minted@lang @i:#1}{false}}
  \define@booleankey{minted@opt@cmd}{#1}%
      {\minted@addto@optlistcl{\minted@optlistcl@cmd}{#2}{}%
        \@namedef{minted@opt@cmd:#1}{true}}
      {\@namedef{minted@opt@cmd:#1}{false}}
}

\minted@def@optcl@novalue{custom lexer}{-x}
\makeatother

\begin{document}
% runsystem(pygmentize -l 'tex' ...)
\begin{minted}[custom lexer=false]{tex}
  % built-in tex lexer
  \@namedef{cmd}{$a + \alpha$} x
\end{minted}

% runsystem(pygmentize -l 'my_lexer.py:TexLexer2' ... -x ...)
\begin{minted}[custom lexer]{my_lexer.py:TexLexer2}
  % custom tex lexer which treats "@" as letter
  \@namedef{cmd}{$a + \alpha$} y
\end{minted}
\end{document}