plistlib --- Generate and parse Apple .plist files

Code source : Lib/

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 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.

Modifié dans la version 3.4: New API, old API deprecated. Support for binary format plists added.

Modifié dans la version 3.8: Support added for reading and writing UID tokens in binary plists as used by NSKeyedArchiver and NSKeyedUnarchiver.

Modifié dans la version 3.9: Old API removed.

Voir aussi

PList manual page

Apple's documentation of the file format.

Ce module définit les fonctions suivantes :

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

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:

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

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 for the binary format raises InvalidFileException when the file cannot be parsed.

Nouveau dans la version 3.4.

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

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

Nouveau dans la version 3.4.

plistlib.dump(value, fp, *, fmt=FMT_XML, sort_keys=True, skipkeys=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:

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.

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.

Nouveau dans la version 3.4.

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

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

Nouveau dans la version 3.4.

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).

It has one attribute, data, which can be used to retrieve the int value of the UID. data must be in the range 0 <= data < 2**64.

Nouveau dans la version 3.8.

The following constants are available:


The XML format for plist files.

Nouveau dans la version 3.4.


The binary format for plist files

Nouveau dans la version 3.4.


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 =

Parsing a plist:

import plistlib

plist = b"""<plist version="1.0">
pl = plistlib.loads(plist)