From c608fb6389da91e159b7e7f55c11ccb9e64f3623 Mon Sep 17 00:00:00 2001 From: Ka-Ping Yee Date: Fri, 23 Mar 2001 05:17:41 +0000 Subject: Give a slightly better explanation of excepthook. --- Doc/lib/libsys.tex | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/Doc/lib/libsys.tex b/Doc/lib/libsys.tex index 44b7853..be5a599 100644 --- a/Doc/lib/libsys.tex +++ b/Doc/lib/libsys.tex @@ -51,19 +51,21 @@ If \var{value} is not \code{None}, this function prints it to \code{sys.displayhook} is called on the result of evaluating an expression entered in an interactive Python session. The display of these values can be customized by assigning -another function to \code{sys.displayhook}. +another one-argument function to \code{sys.displayhook}. \end{funcdesc} \begin{funcdesc}{excepthook}{\var{type}, \var{value}, \var{traceback}} This function prints out a given traceback and exception to \code{sys.stderr}. -\code{sys.excepthook} is called when an exception is raised -and uncaught. In an interactive session this happens just before +When an exception is raised and uncaught, the interpreter calls +\code{sys.excepthook} with three arguments, the exception class, +exception instance, and a traceback object. +In an interactive session this happens just before control is returned to the prompt; in a Python program this happens just before the program exits. The handling of such top-level exceptions can be customized by -assigning another function to \code{sys.excepthook}. +assigning another three-argument function to \code{sys.excepthook}. \end{funcdesc} \begin{datadesc}{__displayhook__} -- cgit v0.12