2 :mod:`aepack` --- Conversion between Python variables and AppleEvent data containers
3 ====================================================================================
7 :synopsis: Conversion between Python variables and AppleEvent data containers.
9 .. sectionauthor:: Vincent Marchetti <vincem@en.com>
10 .. moduleauthor:: Jack Jansen
12 The :mod:`aepack` module defines functions for converting (packing) Python
13 variables to AppleEvent descriptors and back (unpacking). Within Python the
14 AppleEvent descriptor is handled by Python objects of built-in type
15 :class:`AEDesc`, defined in module :mod:`Carbon.AE`.
19 This module has been removed in Python 3.x.
22 The :mod:`aepack` module defines the following functions:
25 .. function:: pack(x[, forcetype])
27 Returns an :class:`AEDesc` object containing a conversion of Python value x. If
28 *forcetype* is provided it specifies the descriptor type of the result.
29 Otherwise, a default mapping of Python types to Apple Event descriptor types is
32 +-----------------+-----------------------------------+
33 | Python type | descriptor type |
34 +=================+===================================+
35 | :class:`FSSpec` | typeFSS |
36 +-----------------+-----------------------------------+
37 | :class:`FSRef` | typeFSRef |
38 +-----------------+-----------------------------------+
39 | :class:`Alias` | typeAlias |
40 +-----------------+-----------------------------------+
41 | integer | typeLong (32 bit integer) |
42 +-----------------+-----------------------------------+
43 | float | typeFloat (64 bit floating point) |
44 +-----------------+-----------------------------------+
46 +-----------------+-----------------------------------+
47 | unicode | typeUnicodeText |
48 +-----------------+-----------------------------------+
50 +-----------------+-----------------------------------+
51 | dictionary | typeAERecord |
52 +-----------------+-----------------------------------+
53 | instance | *see below* |
54 +-----------------+-----------------------------------+
56 If *x* is a Python instance then this function attempts to call an
57 :meth:`__aepack__` method. This method should return an :class:`AEDesc` object.
59 If the conversion *x* is not defined above, this function returns the Python
60 string representation of a value (the repr() function) encoded as a text
64 .. function:: unpack(x[, formodulename])
66 *x* must be an object of type :class:`AEDesc`. This function returns a Python
67 object representation of the data in the Apple Event descriptor *x*. Simple
68 AppleEvent data types (integer, text, float) are returned as their obvious
69 Python counterparts. Apple Event lists are returned as Python lists, and the
70 list elements are recursively unpacked. Object references (ex. ``line 3 of
71 document 1``) are returned as instances of :class:`aetypes.ObjectSpecifier`,
72 unless ``formodulename`` is specified. AppleEvent descriptors with descriptor
73 type typeFSS are returned as :class:`FSSpec` objects. AppleEvent record
74 descriptors are returned as Python dictionaries, with 4-character string keys
75 and elements recursively unpacked.
77 The optional ``formodulename`` argument is used by the stub packages generated
78 by :mod:`gensuitemodule`, and ensures that the OSA classes for object specifiers
79 are looked up in the correct module. This ensures that if, say, the Finder
80 returns an object specifier for a window you get an instance of
81 ``Finder.Window`` and not a generic ``aetypes.Window``. The former knows about
82 all the properties and elements a window has in the Finder, while the latter
88 Module :mod:`Carbon.AE`
89 Built-in access to Apple Event Manager routines.
92 Python definitions of codes for Apple Event descriptor types.