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

Added warning about behavior of open mode 'a' (or 'a+').

This commit is contained in:
Guido van Rossum 1996-05-02 15:16:59 +00:00
parent e71c5a7585
commit 59b328e11e
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Doc/lib/libfuncs.tex
View File

@ -265,7 +265,10 @@ any kind of sequence; the result is always a list.
\code{fopen()}: \var{filename} is the file name to be opened, \code{fopen()}: \var{filename} is the file name to be opened,
\var{mode} indicates how the file is to be opened: \code{'r'} for \var{mode} indicates how the file is to be opened: \code{'r'} for
reading, \code{'w'} for writing (truncating an existing file), and reading, \code{'w'} for writing (truncating an existing file), and
\code{'a'} opens it for appending. Modes \code{'r+'}, \code{'w+'} and \code{'a'} opens it for appending (which on {\em some} {\UNIX}
systems means that {\em all} writes append to the end of the file,
regardless of the current seek position).
Modes \code{'r+'}, \code{'w+'} and
\code{'a+'} open the file for updating, provided the underlying \code{'a+'} open the file for updating, provided the underlying
\code{stdio} library understands this. On systems that differentiate \code{stdio} library understands this. On systems that differentiate
between binary and text files, \code{'b'} appended to the mode opens between binary and text files, \code{'b'} appended to the mode opens

5
Doc/libfuncs.tex
View File

@ -265,7 +265,10 @@ any kind of sequence; the result is always a list.
\code{fopen()}: \var{filename} is the file name to be opened, \code{fopen()}: \var{filename} is the file name to be opened,
\var{mode} indicates how the file is to be opened: \code{'r'} for \var{mode} indicates how the file is to be opened: \code{'r'} for
reading, \code{'w'} for writing (truncating an existing file), and reading, \code{'w'} for writing (truncating an existing file), and
\code{'a'} opens it for appending. Modes \code{'r+'}, \code{'w+'} and \code{'a'} opens it for appending (which on {\em some} {\UNIX}
systems means that {\em all} writes append to the end of the file,
regardless of the current seek position).
Modes \code{'r+'}, \code{'w+'} and
\code{'a+'} open the file for updating, provided the underlying \code{'a+'} open the file for updating, provided the underlying
\code{stdio} library understands this. On systems that differentiate \code{stdio} library understands this. On systems that differentiate
between binary and text files, \code{'b'} appended to the mode opens between binary and text files, \code{'b'} appended to the mode opens