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Added information about the interaction of opening a file in append mode 

and seek() in the description of seek().

This closes SF bug #126850.
This commit is contained in:
Fred Drake 2001-01-04 05:16:39 +00:00
parent 22e9a5eaec
commit 19ae78302e
1 changed files with 6 additions and 1 deletions
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7
Doc/lib/libstdtypes.tex
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@ -1079,7 +1079,12 @@ Files have the following methods:
The \var{whence} argument is optional and defaults to \code{0}
(absolute file positioning); other values are \code{1} (seek
relative to the current position) and \code{2} (seek relative to the
file's end). There is no return value.
file's end). There is no return value. Note that if the file is
opened for appending (mode \code{'a'} or \code{'a+'}), any
\method{seek()} operations will be undone at the next write. If the
file is only opened for writing in append mode (mode \code{'a'}),
this method is essentially a no-op, but it remains useful for files
opened in append mode with reading enabled (mode \code{'a+'}).
\end{methoddesc}
\begin{methoddesc}[file]{tell}{}