Try to make sure \code always uses roman (non-italic) text.
Change a 1.6 version number used in a an example in a comment to 2.0.
diff --git a/Doc/texinputs/python.sty b/Doc/texinputs/python.sty
index 6637956..eed9377 100644
--- a/Doc/texinputs/python.sty
+++ b/Doc/texinputs/python.sty
@@ -710,7 +710,7 @@
% Also for consistency: spell Python "Python", not "python"!
% code is the most difficult one...
-\newcommand{\code}[1]{{\@vobeyspaces\@noligs\def\{{\char`\{}\def\}{\char`\}}\def\~{\char`\~}\def\^{\char`\^}\def\e{\char`\\}\def\${\char`\$}\def\#{\char`\#}\def\&{\char`\&}\def\%{\char`\%}%
+\newcommand{\code}[1]{\textrm{\@vobeyspaces\@noligs\def\{{\char`\{}\def\}{\char`\}}\def\~{\char`\~}\def\^{\char`\^}\def\e{\char`\\}\def\${\char`\$}\def\#{\char`\#}\def\&{\char`\&}\def\%{\char`\%}%
\texttt{#1}}}
\newcommand{\bfcode}[1]{\code{\bfseries#1}} % bold-faced code font
@@ -838,7 +838,7 @@
%
% Example:
% \versionadded{1.5.2}
-% \versionchanged[short explanation]{1.6}
+% \versionchanged[short explanation]{2.0}
%
\newcommand{\versionadded}[1]{%
{ New in version #1. }}