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Document several variables that were previously undocumented,

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including the new __stdin__, __stdout__ and __stderr__.
Also moved setttrace around to its proper place in the alphabet.
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Guido van Rossum 1998-06-10 17:57:44 +00:00
parent 1f40cd6314
commit 3e5fe422cc
1 changed files with 35 additions and 9 deletions
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44
Doc/lib/libsys.tex
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@ -25,6 +25,10 @@ It is always available.
modules.)
\end{datadesc}
\begin{datadesc}{copyright}
A string containing the copyright pertaining to the Python interpreter.
\end{datadesc}
\begin{funcdesc}{exc_info}{}
This function returns a tuple of three values that give information
about the exception that is currently being handled. The information
@ -87,6 +91,11 @@ modules are installed in
where \var{version} is equal to \code{version[:3]}.
\end{datadesc}
\begin{datadesc}{executable}
A string giving the name of the executable binary for the Python
interpreter, on systems where this makes sense.
\end{datadesc}
\begin{funcdesc}{exit}{n}
Exit from Python with numeric exit status \var{n}. This is
implemented by raising the \exception{SystemExit} exception, so cleanup
@ -129,6 +138,13 @@ as that of the return values from \function{exc_info()} above.
concern for these variables, unlike for \code{exc_type} etc.)
\end{datadesc}
\begin{datadesc}{maxint}
The largest positive integer supported by Python's regular integer
type. This is at least 2**31-1. The largest negative integer is
\code{-maxint-1} -- the asymmetry results from the use of 2's
complement binary arithmetic.
\end{datadesc}
\begin{datadesc}{modules}
This is a dictionary that maps module names to modules which have
already been loaded. This can be manipulated to force reloading of
@ -196,14 +212,6 @@ threads. Setting it to a value \code{<=} 0 checks every virtual instruction,
maximizing responsiveness as well as overhead.
\end{funcdesc}
\begin{funcdesc}{settrace}{tracefunc}
Set the system's trace function, which allows you to implement a
Python source code debugger in Python. See section ``How It Works''
in the chapter on the Python Debugger.
\end{funcdesc}
\index{trace function}
\index{debugger}
\begin{funcdesc}{setprofile}{profilefunc}
Set the system's profile function, which allows you to implement a
Python source code profiler in Python. See the chapter on the
@ -216,6 +224,14 @@ maximizing responsiveness as well as overhead.
\index{profile function}
\index{profiler}
\begin{funcdesc}{settrace}{tracefunc}
Set the system's trace function, which allows you to implement a
Python source code debugger in Python. See section ``How It Works''
in the chapter on the Python Debugger.
\end{funcdesc}
\index{trace function}
\index{debugger}
\begin{datadesc}{stdin}
\dataline{stdout}
\dataline{stderr}
@ -236,6 +252,16 @@ maximizing responsiveness as well as overhead.
\refstmodindex{os}
\end{datadesc}
\begin{datadesc}{__stdin__}
\dataline{__stdout__}
\dataline{__stderr__}
These objects contain the original values of \code{stdin},
\code{stderr} and \code{stdout} at the start of the program. They are
used during finalization, and could be useful to restore the actual
files to known working file objects in case they have been overwritten
with a broken object.
\end{datadesc}
\begin{datadesc}{tracebacklimit}
When this variable is set to an integer value, it determines the
maximum number of levels of traceback information printed when an
@ -245,5 +271,5 @@ exception type and value are printed.
\end{datadesc}
\begin{datadesc}{version}
A string containing the version number of the Python interpreter.
A string containing the version number of the Python interpreter.
\end{datadesc}