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Diffstat (limited to 'Doc/lib/libsys.tex')
| -rw-r--r-- | Doc/lib/libsys.tex | 10 |
1 files 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__} |