"plistlib" --- 產生和剖析 Apple ".plist" 檔案
*********************************************

**原始碼：**Lib/plistlib.py

======================================================================

This module provides an interface for reading and writing the
"property list" files used by Apple, primarily on macOS and iOS. This
module supports both binary and XML plist files.

The property list (".plist") file format is a simple serialization
supporting basic object types, like dictionaries, lists, numbers and
strings.  Usually the top level object is a dictionary.

To write out and to parse a plist file, use the "dump()" and "load()"
functions.

To work with plist data in bytes or string objects, use "dumps()" and
"loads()".

Values can be strings, integers, floats, booleans, tuples, lists,
dictionaries (but only with string keys), "bytes", "bytearray" or
"datetime.datetime" objects.

在 3.4 版的變更: New API, old API deprecated.  Support for binary
format plists added.

在 3.8 版的變更: Support added for reading and writing "UID" tokens in
binary plists as used by NSKeyedArchiver and NSKeyedUnarchiver.

在 3.9 版的變更: Old API removed.

也參考:

  PList manual page
     Apple's documentation of the file format.

此模組定義了以下函式：

plistlib.load(fp, *, fmt=None, dict_type=dict, aware_datetime=False)

   Read a plist file. *fp* should be a readable and binary file
   object. Return the unpacked root object (which usually is a
   dictionary).

   The *fmt* is the format of the file and the following values are
   valid:

   * "None"：自動偵測檔案格式

   * "FMT_XML"：XML 檔案格式

   * "FMT_BINARY"：二進位 plist 格式

   The *dict_type* is the type used for dictionaries that are read
   from the plist file.

   When *aware_datetime* is true, fields with type "datetime.datetime"
   will be created as aware object, with "tzinfo" as "datetime.UTC".

   XML data for the "FMT_XML" format is parsed using the Expat parser
   from "xml.parsers.expat" -- see its documentation for possible
   exceptions on ill-formed XML.  Unknown elements will simply be
   ignored by the plist parser.

   The parser raises "InvalidFileException" when the file cannot be
   parsed.

   在 3.4 版被加入.

   在 3.13 版的變更: 新增僅限關鍵字參數 *aware_datetime*。

plistlib.loads(data, *, fmt=None, dict_type=dict, aware_datetime=False)

   Load a plist from a bytes or string object. See "load()" for an
   explanation of the keyword arguments.

   在 3.4 版被加入.

   在 3.13 版的變更: *data* 在 *fmt* 等於 "FMT_XML" 時可以是一個字串。

plistlib.dump(value, fp, *, fmt=FMT_XML, sort_keys=True, skipkeys=False, aware_datetime=False)

   Write *value* to a plist file. *fp* should be a writable, binary
   file object.

   The *fmt* argument specifies the format of the plist file and can
   be one of the following values:

   * "FMT_XML": XML formatted plist file

   * "FMT_BINARY": Binary formatted plist file

   When *sort_keys* is true (the default) the keys for dictionaries
   will be written to the plist in sorted order, otherwise they will
   be written in the iteration order of the dictionary.

   When *skipkeys* is false (the default) the function raises
   "TypeError" when a key of a dictionary is not a string, otherwise
   such keys are skipped.

   When *aware_datetime* is true and any field with type
   "datetime.datetime" is set as an aware object, it will convert to
   UTC timezone before writing it.

   A "TypeError" will be raised if the object is of an unsupported
   type or a container that contains objects of unsupported types.

   An "OverflowError" will be raised for integer values that cannot be
   represented in (binary) plist files.

   在 3.4 版被加入.

   在 3.13 版的變更: 新增僅限關鍵字參數 *aware_datetime*。

plistlib.dumps(value, *, fmt=FMT_XML, sort_keys=True, skipkeys=False, aware_datetime=False)

   Return *value* as a plist-formatted bytes object. See the
   documentation for "dump()" for an explanation of the keyword
   arguments of this function.

   在 3.4 版被加入.

The following classes are available:

class plistlib.UID(data)

   Wraps an "int".  This is used when reading or writing
   NSKeyedArchiver encoded data, which contains UID (see PList
   manual).

   data

      Int value of the UID.  It must be in the range "0 <= data <
      2**64".

   在 3.8 版被加入.

以下常數可供使用：

plistlib.FMT_XML

   The XML format for plist files.

   在 3.4 版被加入.

plistlib.FMT_BINARY

   The binary format for plist files

   在 3.4 版被加入.

這個模組定義了以下例外：

exception plistlib.InvalidFileException

   當檔案無法被剖析時引發。

   在 3.4 版被加入.


範例
====

Generating a plist:

   import datetime
   import plistlib

   pl = dict(
       aString = "Doodah",
       aList = ["A", "B", 12, 32.1, [1, 2, 3]],
       aFloat = 0.1,
       anInt = 728,
       aDict = dict(
           anotherString = "<hello & hi there!>",
           aThirdString = "M\xe4ssig, Ma\xdf",
           aTrueValue = True,
           aFalseValue = False,
       ),
       someData = b"<binary gunk>",
       someMoreData = b"<lots of binary gunk>" * 10,
       aDate = datetime.datetime.now()
   )
   print(plistlib.dumps(pl).decode())

Parsing a plist:

   import plistlib

   plist = b"""<plist version="1.0">
   <dict>
       <key>foo</key>
       <string>bar</string>
   </dict>
   </plist>"""
   pl = plistlib.loads(plist)
   print(pl["foo"])
