Mirror
/
cpython
mirror of https://github.com/python/cpython
4
1
Fork 0
Code Issues Releases Wiki Activity

Clarified new text about math exceptions. 

Bugfix candidate.
This commit is contained in:
Tim Peters 2003-04-26 15:11:08 +00:00
parent 4931130f12
commit 965697fc4b
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Doc/lib/libmath.tex
View File

@ -146,13 +146,18 @@ The mathematical constant \emph{e}.
\end{datadesc}
\begin{notice}
Specific exceptions raised in assorted error cases (and even whether some
The \module{math} module consists mostly of thin wrappers around
the platform C math library functions. Behavior in exceptional cases is
loosely specified by the C standards, and Python inherits much of its
math-function error-reporting behavior from the platform C
implementation. As a result,
the specific exceptions raised in error cases (and even whether some
arguments are considered to be exceptional at all) are not defined in any
useful cross-platform or cross-release way. For example, whether
\code{math.log(0)} returns \code{-Inf} or raises \exception{ValueError} or
\exception{OverflowError} is both platform- and release-dependent, and in
cases where \code{math.log(0)} raises an \exception{OverflowError},
\code{math.log(0L)} often raises a \exception{ValueError}.
\exception{OverflowError} isn't defined, and in
cases where \code{math.log(0)} raises \exception{OverflowError},
\code{math.log(0L)} may raise \exception{ValueError} instead.
\end{notice}
\begin{seealso}