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Diffstat (limited to 'Doc/lib/libanydbm.tex')
| -rw-r--r-- | Doc/lib/libanydbm.tex | 54 |
1 files changed, 39 insertions, 15 deletions
diff --git a/Doc/lib/libanydbm.tex b/Doc/lib/libanydbm.tex index 2d3fe67..592fd21 100644 --- a/Doc/lib/libanydbm.tex +++ b/Doc/lib/libanydbm.tex @@ -1,19 +1,15 @@ -\section{Standard Modules \module{anydbm} and \module{dumbdbm}} +\section{Standard Module \module{anydbm}} \label{module-anydbm} -\label{module-dumbdbm} \stmodindex{anydbm} -\stmodindex{dumbdbm} \module{anydbm} is a generic interface to variants of the DBM -database--DBM, GDBM, or dbhash. If none of these modules is -installed, the slow-but-simple implementation in module \module{dumbdbm} -will be used. Both modules provide the same interface: - -% not the best solution, but it's what you get for documenting both -% at the same time. -\setindexsubitem{(in modules anydbm, dumbdbm)} +database --- \module{dbhash}\refbimodindex{dbhash}, +\module{gdbm}\refbimodindex{gdbm}, or \module{dbm}\refbimodindex{dbm}. +If none of these modules is installed, the slow-but-simple +implementation in module \module{dumbdbm}\refstmodindex{dumbdbm} will +be used. -\begin{funcdesc}{open}{filename\optional{, flag, mode}} +\begin{funcdesc}{open}{filename\optional{, flag\optional{, mode}}} Open the database file \var{filename} and return a corresponding object. The optional \var{flag} argument can be \code{'r'} to open an existing database for reading only, @@ -27,13 +23,41 @@ only when the database has to be created. It defaults to octal \code{0666} (and will be modified by the prevailing umask). \end{funcdesc} +\begin{excdesc}{error} +An alternate name for the \exception{error} exception defined by the +underlying database implementation. +\end{excdesc} + The object returned by \function{open()} supports most of the same functionality as dictionaries; keys and their corresponding values can be stored, retrieved, and deleted, and the \method{has_key()} and \method{keys()} methods are available. Keys and values must always be strings. -Both modules also export the exception \exception{error}, which is -raised for various problems. The \exception{anydbm.error} exception -is simply a different name for the \exception{error} exception of the -underlying implementation module used. + + +\section{Standard Module \module{dumbdbm}} +\label{module-dumbdbm} +\stmodindex{dumbdbm} + +A simple and slow database implemented entirely in Python. This +should only be used when no other DBM-style database is available. + + +\begin{funcdesc}{open}{filename\optional{, flag\optional{, mode}}} +Open the database file \var{filename} and return a corresponding object. +The optional \var{flag} argument can be +\code{'r'} to open an existing database for reading only, +\code{'w'} to open an existing database for reading and writing, +\code{'c'} to create the database if it doesn't exist, or +\code{'n'}, which will always create a new empty database. If not +specified, the default value is \code{'r'}. + +The optional \var{mode} argument is the \UNIX{} mode of the file, used +only when the database has to be created. It defaults to octal +\code{0666} (and will be modified by the prevailing umask). +\end{funcdesc} + +\begin{excdesc}{error} +Raised for errors not reported as \exception{KeyError} errors. +\end{excdesc} |