\infinity,

\plusminus:  New macros to allow us to avoid math mode for these symbols.

Doc/texinputs/python.sty

@@ -752,6 +752,8 @@
 \newcommand{\C}{C}
 \newcommand{\EOF}{{\sc eof}}
 \newcommand{\NULL}{\constant{NULL}}
+\newcommand{\infinity}{\ensuremath{\infty}}
+\newcommand{\plusminus}{\ensuremath{\pm}}
 
 % Also for consistency: spell Python "Python", not "python"!