\item
The choice of which database package will be used
-(e.g. \refmodule{dbm} or \refmodule{gdbm}) depends on which interface
+(such as \refmodule{dbm} or \refmodule{gdbm}) depends on which interface
is available. Therefore it is not safe to open the database directly
using \refmodule{dbm}. The database is also (unfortunately) subject
to the limitations of \refmodule{dbm}, if it is used --- this means
\begin{classdesc}{Shelf}{dict\optional{, binary=False}}
A subclass of \class{UserDict.DictMixin} which stores pickled values in the
-\var{dict} object. If the \var{binary} parameter is \constant{True}, binary
+\var{dict} object. If the \var{binary} parameter is \code{True}, binary
pickles will be used. This can provide much more compact storage than plain
-text pickles, depending on the nature of the objects stored in the databse.
+text pickles, depending on the nature of the objects stored in the database.
\end{classdesc}
\begin{classdesc}{BsdDbShelf}{dict\optional{, binary=False}}
A subclass of \class{Shelf} which exposes \method{first}, \method{next},
-{}\method{previous}, \method{last} and \method{set_location} which are
+\method{previous}, \method{last} and \method{set_location} which are
available in the \module{bsddb} module but not in other database modules.
The \var{dict} object passed to the constructor must support those methods.
This is generally accomplished by calling one of \function{bsddb.hashopen},
class.
\end{classdesc}
-\begin{classdesc}{DbfilenameShelf}{dict\optional{, flag='c'}\optional{, binary=False}}
-A subclass of \class{Shelf} which accepts a filename instead of a dict-like
+\begin{classdesc}{DbfilenameShelf}{filename\optional{, flag='c'\optional{, binary=False}}}
+A subclass of \class{Shelf} which accepts a \var{filename} instead of a dict-like
object. The underlying file will be opened using \function{anydbm.open}.
By default, the file will be created and opened for both read and write.
The optional \var{binary} parameter has the same interpretation as for the