How to disable "commandchars" in a "Verbatim" environment?

Question

How can I disable commandchars for a particular Verbatim environment, if I set it as a global option via \fvset earlier? I'm trying this:

\documentclass{article}
\usepackage{fancyvrb}
\fvset{commandchars=+\{\}}
\begin{document}
\begin{Verbatim}
Hello, +textbf{world}!
\end{Verbatim}
Now, I want to disable command chars:
\begin{Verbatim}[commandchars=]
Hello, +textbf{world}!
\end{Verbatim}
\end{document}

I'm getting:

! Improper alphabetic constant.
<to be read again>
                   \relax
l.9 \begin{Verbatim}[commandchars=]

Answer 1

Set commandchars=none:

\documentclass{article}
\usepackage{fancyvrb}
\fvset{commandchars=+\{\}}
\begin{document}
\begin{Verbatim}
    Hello, +textbf{world}!
\end{Verbatim}
Now, I want to disable command chars:
\begin{Verbatim}[commandchars=none]
    Hello, +textbf{world}!
\end{Verbatim}
\end{document}