Index: libsubprocess.tex
===================================================================
--- libsubprocess.tex	(revisión: 64442)
+++ libsubprocess.tex	(copia de trabajo)
@@ -327,13 +327,13 @@
 \subsubsection{Replacing os.popen*}
 
 \begin{verbatim}
-pipe = os.popen(cmd, mode='r', bufsize)
+pipe = os.popen(cmd, 'r', bufsize)
 ==>
 pipe = Popen(cmd, shell=True, bufsize=bufsize, stdout=PIPE).stdout
 \end{verbatim}
 
 \begin{verbatim}
-pipe = os.popen(cmd, mode='w', bufsize)
+pipe = os.popen(cmd, 'w', bufsize)
 ==>
 pipe = Popen(cmd, shell=True, bufsize=bufsize, stdin=PIPE).stdin
 \end{verbatim}