for this \var{type} of callback. The type of the data depends on the

\var{type} of callback as follows:

\lineii{audio}{String which can be passed unmodified to

\function{al.writesamps()}.}

\lineii{pnum}{Integer giving the program (track) number.}

Form objects have the following data attributes; see the FORMS

documentation:

\lineiii{window}{int (read-only)}{GL window id}

\lineiii{w}{float}{form width}

\lineiii{h}{float}{form height}

FORMS objects have these data attributes; see the FORMS documentation:

\lineiii{objclass}{int (read-only)}{object class}

\lineiii{type}{int (read-only)}{object type}

\lineiii{boxtype}{int}{box type}

The following image types are recognized, as listed below with the

return value from \function{what()}:

\lineii{'rgb'}{SGI ImgLib Files}

\lineii{'gif'}{GIF 87a and 89a Files}

\lineii{'pbm'}{Portable Bitmap Files}

\function{decompress()} calls will use these options. The following

options are available:

\lineii{'forcegray'}{%

Force output to be grayscale, even if input is RGB.}

\lineii{'quality'}{%

The possible values for \code{p_sign_posn} and \code{n_sign_posn}

are given below.

\lineii{0}{Currency and value are surrounded by parentheses.}

\lineii{1}{The sign should precede the value and currency symbol.}

\lineii{2}{The sign should follow the value and currency symbol.}

Format characters for the \method{lock()} method have the following

meaning:

\lineii{u}{unlock the specified region}

\lineii{r}{request a read lock for the specified section}

\lineii{w}{request a write lock for the specified section}

\end{tableii}

In addition the following modifiers can be added to the format:

\lineiii{|}{wait until the lock has been granted}{}

\lineiii{?}{return the first lock conflicting with the requested lock, or

\code{None} if there is no conflict.}{(1)}

Format characters for the \method{flags()} method have the following

meanings:

\lineii{a}{append only flag}

\lineii{c}{close on exec flag}

\lineii{n}{no delay flag (also called non-blocking flag)}

In addition the following modifiers can be added to the format:

\lineiii{!}{turn the specified flags 'off', instead of the default 'on'}{(1)}

\lineiii{=}{replace the flags, instead of the default 'OR' operation}{(1)}

\lineiii{?}{return a string in which the characters represent the flags that

abbreviation is unambiguous. The following are the keys currently

defined:

\lineii{'calls'}{call count}

\lineii{'cumulative'}{cumulative time}

\lineii{'file'}{file name}

man page for detailed information about these values. A brief

summary is presented here:

\lineii{0}{time in user mode (float)}

\lineii{1}{time in system mode (float)}

\lineii{2}{maximum resident set size}

Format characters have the following meaning; the conversion between C

and Python values should be obvious given their types:

\lineiii{x}{pad byte}{no value}

\lineiii{c}{char}{string of length 1}

\lineiii{b}{signed char}{integer}

indicate the byte order, size and alignment of the packed data,

according to the following table:

\lineiii{@}{native}{native}

\lineiii{=}{native}{standard}

\lineiii{<}{little-endian}{standard}