Lib/fontTools/misc/plistlib.py - third_party/fonttools - Git at Google

 import sys
 import re
 import warnings
 from io import BytesIO
 from datetime import datetime
 from base64 import b64encode, b64decode
 from numbers import Integral

 from types import SimpleNamespace
 from collections.abc import Mapping
 from functools import singledispatch

 from fontTools.misc import etree

 from fontTools.misc.py23 import (
     tounicode,
     tobytes,
 )

 # By default, we
 #  - deserialize <data> elements as bytes and
 #  - serialize bytes as <data> elements.
 # Before, on Python 2, we
 #  - deserialized <data> elements as plistlib.Data objects, in order to
 #    distinguish them from the built-in str type (which is bytes on python2)
 #  - serialized bytes as <string> elements (they must have only contained
 #    ASCII characters in this case)
 # You can pass use_builtin_types=[True|False] to the load/dump etc. functions
 # to enforce a specific treatment.
 # NOTE that unicode type always maps to <string> element, and plistlib.Data
 # always maps to <data> element, regardless of use_builtin_types.
 USE_BUILTIN_TYPES = True

 XML_DECLARATION = b"""<?xml version='1.0' encoding='UTF-8'?>"""

 PLIST_DOCTYPE = (
     b'<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" '
     b'"http://www.apple.com/DTDs/PropertyList-1.0.dtd">'
 )

 # Date should conform to a subset of ISO 8601:
 # YYYY '-' MM '-' DD 'T' HH ':' MM ':' SS 'Z'
 _date_parser = re.compile(
     r"(?P<year>\d\d\d\d)"
     r"(?:-(?P<month>\d\d)"
     r"(?:-(?P<day>\d\d)"
     r"(?:T(?P<hour>\d\d)"
     r"(?::(?P<minute>\d\d)"
     r"(?::(?P<second>\d\d))"
     r"?)?)?)?)?Z",
     re.ASCII
 )


 def _date_from_string(s):
     order = ("year", "month", "day", "hour", "minute", "second")
     gd = _date_parser.match(s).groupdict()
     lst = []
     for key in order:
         val = gd[key]
         if val is None:
             break
         lst.append(int(val))
     return datetime(*lst)


 def _date_to_string(d):
     return "%04d-%02d-%02dT%02d:%02d:%02dZ" % (
         d.year,
         d.month,
         d.day,
         d.hour,
         d.minute,
         d.second,
     )


 def _encode_base64(data, maxlinelength=76, indent_level=1):
     data = b64encode(data)
     if data and maxlinelength:
         # split into multiple lines right-justified to 'maxlinelength' chars
         indent = b"\n" + b"  " * indent_level
         max_length = max(16, maxlinelength - len(indent))
         chunks = []
         for i in range(0, len(data), max_length):
             chunks.append(indent)
             chunks.append(data[i : i + max_length])
         chunks.append(indent)
         data = b"".join(chunks)
     return data


 class Data:
     """Wrapper for binary data returned in place of the built-in bytes type
     when loading property list data with use_builtin_types=False.
     """

     def __init__(self, data):
         if not isinstance(data, bytes):
             raise TypeError("Expected bytes, found %s" % type(data).__name__)
         self.data = data

     @classmethod
     def fromBase64(cls, data):
         return cls(b64decode(data))

     def asBase64(self, maxlinelength=76, indent_level=1):
         return _encode_base64(
             self.data, maxlinelength=maxlinelength, indent_level=indent_level
         )

     def __eq__(self, other):
         if isinstance(other, self.__class__):
             return self.data == other.data
         elif isinstance(other, bytes):
             return self.data == other
         else:
             return NotImplemented

     def __repr__(self):
         return "%s(%s)" % (self.__class__.__name__, repr(self.data))


 class PlistTarget:
     """ Event handler using the ElementTree Target API that can be
     passed to a XMLParser to produce property list objects from XML.
     It is based on the CPython plistlib module's _PlistParser class,
     but does not use the expat parser.

     >>> from fontTools.misc import etree
     >>> parser = etree.XMLParser(target=PlistTarget())
     >>> result = etree.XML(
     ...     "<dict>"
     ...     "    <key>something</key>"
     ...     "    <string>blah</string>"
     ...     "</dict>",
     ...     parser=parser)
     >>> result == {"something": "blah"}
     True

     Links:
     https://github.com/python/cpython/blob/master/Lib/plistlib.py
     http://lxml.de/parsing.html#the-target-parser-interface
     """

     def __init__(self, use_builtin_types=None, dict_type=dict):
         self.stack = []
         self.current_key = None
         self.root = None
         if use_builtin_types is None:
             self._use_builtin_types = USE_BUILTIN_TYPES
         else:
             if use_builtin_types is False:
                 warnings.warn(
                     "Setting use_builtin_types to False is deprecated and will be "
                     "removed soon.",
                     DeprecationWarning,
                 )
             self._use_builtin_types = use_builtin_types
         self._dict_type = dict_type

     def start(self, tag, attrib):
         self._data = []
         handler = _TARGET_START_HANDLERS.get(tag)
         if handler is not None:
             handler(self)

     def end(self, tag):
         handler = _TARGET_END_HANDLERS.get(tag)
         if handler is not None:
             handler(self)

     def data(self, data):
         self._data.append(data)

     def close(self):
         return self.root

     # helpers

     def add_object(self, value):
         if self.current_key is not None:
             if not isinstance(self.stack[-1], type({})):
                 raise ValueError("unexpected element: %r" % self.stack[-1])
             self.stack[-1][self.current_key] = value
             self.current_key = None
         elif not self.stack:
             # this is the root object
             self.root = value
         else:
             if not isinstance(self.stack[-1], type([])):
                 raise ValueError("unexpected element: %r" % self.stack[-1])
             self.stack[-1].append(value)

     def get_data(self):
         data = "".join(self._data)
         self._data = []
         return data


 # event handlers


 def start_dict(self):
     d = self._dict_type()
     self.add_object(d)
     self.stack.append(d)


 def end_dict(self):
     if self.current_key:
         raise ValueError("missing value for key '%s'" % self.current_key)
     self.stack.pop()


 def end_key(self):
     if self.current_key or not isinstance(self.stack[-1], type({})):
         raise ValueError("unexpected key")
     self.current_key = self.get_data()


 def start_array(self):
     a = []
     self.add_object(a)
     self.stack.append(a)


 def end_array(self):
     self.stack.pop()


 def end_true(self):
     self.add_object(True)


 def end_false(self):
     self.add_object(False)


 def end_integer(self):
     self.add_object(int(self.get_data()))


 def end_real(self):
     self.add_object(float(self.get_data()))


 def end_string(self):
     self.add_object(self.get_data())


 def end_data(self):
     if self._use_builtin_types:
         self.add_object(b64decode(self.get_data()))
     else:
         self.add_object(Data.fromBase64(self.get_data()))


 def end_date(self):
     self.add_object(_date_from_string(self.get_data()))


 _TARGET_START_HANDLERS = {"dict": start_dict, "array": start_array}

 _TARGET_END_HANDLERS = {
     "dict": end_dict,
     "array": end_array,
     "key": end_key,
     "true": end_true,
     "false": end_false,
     "integer": end_integer,
     "real": end_real,
     "string": end_string,
     "data": end_data,
     "date": end_date,
 }


 # functions to build element tree from plist data


 def _string_element(value, ctx):
     el = etree.Element("string")
     el.text = value
     return el


 def _bool_element(value, ctx):
     if value:
         return etree.Element("true")
     else:
         return etree.Element("false")


 def _integer_element(value, ctx):
     if -1 << 63 <= value < 1 << 64:
         el = etree.Element("integer")
         el.text = "%d" % value
         return el
     else:
         raise OverflowError(value)


 def _real_element(value, ctx):
     el = etree.Element("real")
     el.text = repr(value)
     return el


 def _dict_element(d, ctx):
     el = etree.Element("dict")
     items = d.items()
     if ctx.sort_keys:
         items = sorted(items)
     ctx.indent_level += 1
     for key, value in items:
         if not isinstance(key, str):
             if ctx.skipkeys:
                 continue
             raise TypeError("keys must be strings")
         k = etree.SubElement(el, "key")
         k.text = tounicode(key, "utf-8")
         el.append(_make_element(value, ctx))
     ctx.indent_level -= 1
     return el


 def _array_element(array, ctx):
     el = etree.Element("array")
     if len(array) == 0:
         return el
     ctx.indent_level += 1
     for value in array:
         el.append(_make_element(value, ctx))
     ctx.indent_level -= 1
     return el


 def _date_element(date, ctx):
     el = etree.Element("date")
     el.text = _date_to_string(date)
     return el


 def _data_element(data, ctx):
     el = etree.Element("data")
     el.text = _encode_base64(
         data,
         maxlinelength=(76 if ctx.pretty_print else None),
         indent_level=ctx.indent_level,
     )
     return el


 def _string_or_data_element(raw_bytes, ctx):
     if ctx.use_builtin_types:
         return _data_element(raw_bytes, ctx)
     else:
         try:
             string = raw_bytes.decode(encoding="ascii", errors="strict")
         except UnicodeDecodeError:
             raise ValueError(
                 "invalid non-ASCII bytes; use unicode string instead: %r"
                 % raw_bytes
             )
         return _string_element(string, ctx)


 @singledispatch
 def _make_element(value, ctx):
     raise TypeError("unsupported type: %s" % type(value))

 _make_element.register(str)(_string_element)
 _make_element.register(bool)(_bool_element)
 _make_element.register(Integral)(_integer_element)
 _make_element.register(float)(_real_element)
 _make_element.register(Mapping)(_dict_element)
 _make_element.register(list)(_array_element)
 _make_element.register(tuple)(_array_element)
 _make_element.register(datetime)(_date_element)
 _make_element.register(bytes)(_string_or_data_element)
 _make_element.register(bytearray)(_data_element)
 _make_element.register(Data)(lambda v, ctx: _data_element(v.data, ctx))


 # Public functions to create element tree from plist-compatible python
 # data structures and viceversa, for use when (de)serializing GLIF xml.


 def totree(
     value,
     sort_keys=True,
     skipkeys=False,
     use_builtin_types=None,
     pretty_print=True,
     indent_level=1,
 ):
     if use_builtin_types is None:
         use_builtin_types = USE_BUILTIN_TYPES
     else:
         use_builtin_types = use_builtin_types
     context = SimpleNamespace(
         sort_keys=sort_keys,
         skipkeys=skipkeys,
         use_builtin_types=use_builtin_types,
         pretty_print=pretty_print,
         indent_level=indent_level,
     )
     return _make_element(value, context)


 def fromtree(tree, use_builtin_types=None, dict_type=dict):
     target = PlistTarget(
         use_builtin_types=use_builtin_types, dict_type=dict_type
     )
     for action, element in etree.iterwalk(tree, events=("start", "end")):
         if action == "start":
             target.start(element.tag, element.attrib)
         elif action == "end":
             # if there are no children, parse the leaf's data
             if not len(element):
                 # always pass str, not None
                 target.data(element.text or "")
             target.end(element.tag)
     return target.close()


 # python3 plistlib API


 def load(fp, use_builtin_types=None, dict_type=dict):
     if not hasattr(fp, "read"):
         raise AttributeError(
             "'%s' object has no attribute 'read'" % type(fp).__name__
         )
     target = PlistTarget(
         use_builtin_types=use_builtin_types, dict_type=dict_type
     )
     parser = etree.XMLParser(target=target)
     result = etree.parse(fp, parser=parser)
     # lxml returns the target object directly, while ElementTree wraps
     # it as the root of an ElementTree object
     try:
         return result.getroot()
     except AttributeError:
         return result


 def loads(value, use_builtin_types=None, dict_type=dict):
     fp = BytesIO(value)
     return load(fp, use_builtin_types=use_builtin_types, dict_type=dict_type)


 def dump(
     value,
     fp,
     sort_keys=True,
     skipkeys=False,
     use_builtin_types=None,
     pretty_print=True,
 ):
     if not hasattr(fp, "write"):
         raise AttributeError(
             "'%s' object has no attribute 'write'" % type(fp).__name__
         )
     root = etree.Element("plist", version="1.0")
     el = totree(
         value,
         sort_keys=sort_keys,
         skipkeys=skipkeys,
         use_builtin_types=use_builtin_types,
         pretty_print=pretty_print,
     )
     root.append(el)
     tree = etree.ElementTree(root)
     # we write the doctype ourselves instead of using the 'doctype' argument
     # of 'write' method, becuse lxml will force adding a '\n' even when
     # pretty_print is False.
     if pretty_print:
         header = b"\n".join((XML_DECLARATION, PLIST_DOCTYPE, b""))
     else:
         header = XML_DECLARATION + PLIST_DOCTYPE
     fp.write(header)
     tree.write(
         fp, encoding="utf-8", pretty_print=pretty_print, xml_declaration=False
     )


 def dumps(
     value,
     sort_keys=True,
     skipkeys=False,
     use_builtin_types=None,
     pretty_print=True,
 ):
     fp = BytesIO()
     dump(
         value,
         fp,
         sort_keys=sort_keys,
         skipkeys=skipkeys,
         use_builtin_types=use_builtin_types,
         pretty_print=pretty_print,
     )
     return fp.getvalue()
	import sys
	import re
	import warnings
	from io import BytesIO
	from datetime import datetime
	from base64 import b64encode, b64decode
	from numbers import Integral

	from types import SimpleNamespace
	from collections.abc import Mapping
	from functools import singledispatch

	from fontTools.misc import etree

	from fontTools.misc.py23 import (
	tounicode,
	tobytes,
	)

	# By default, we
	# - deserialize <data> elements as bytes and
	# - serialize bytes as <data> elements.
	# Before, on Python 2, we
	# - deserialized <data> elements as plistlib.Data objects, in order to
	# distinguish them from the built-in str type (which is bytes on python2)
	# - serialized bytes as <string> elements (they must have only contained
	# ASCII characters in this case)
	# You can pass use_builtin_types=[True\|False] to the load/dump etc. functions
	# to enforce a specific treatment.
	# NOTE that unicode type always maps to <string> element, and plistlib.Data
	# always maps to <data> element, regardless of use_builtin_types.
	USE_BUILTIN_TYPES = True

	XML_DECLARATION = b"""<?xml version='1.0' encoding='UTF-8'?>"""

	PLIST_DOCTYPE = (
	b'<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" '
	b'"http://www.apple.com/DTDs/PropertyList-1.0.dtd">'
	)

	# Date should conform to a subset of ISO 8601:
	# YYYY '-' MM '-' DD 'T' HH ':' MM ':' SS 'Z'
	_date_parser = re.compile(
	r"(?P<year>\d\d\d\d)"
	r"(?:-(?P<month>\d\d)"
	r"(?:-(?P<day>\d\d)"
	r"(?:T(?P<hour>\d\d)"
	r"(?::(?P<minute>\d\d)"
	r"(?::(?P<second>\d\d))"
	r"?)?)?)?)?Z",
	re.ASCII
	)


	def _date_from_string(s):
	order = ("year", "month", "day", "hour", "minute", "second")
	gd = _date_parser.match(s).groupdict()
	lst = []
	for key in order:
	val = gd[key]
	if val is None:
	break
	lst.append(int(val))
	return datetime(*lst)


	def _date_to_string(d):
	return "%04d-%02d-%02dT%02d:%02d:%02dZ" % (
	d.year,
	d.month,
	d.day,
	d.hour,
	d.minute,
	d.second,
	)


	def _encode_base64(data, maxlinelength=76, indent_level=1):
	data = b64encode(data)
	if data and maxlinelength:
	# split into multiple lines right-justified to 'maxlinelength' chars
	indent = b"\n" + b" " * indent_level
	max_length = max(16, maxlinelength - len(indent))
	chunks = []
	for i in range(0, len(data), max_length):
	chunks.append(indent)
	chunks.append(data[i : i + max_length])
	chunks.append(indent)
	data = b"".join(chunks)
	return data


	class Data:
	"""Wrapper for binary data returned in place of the built-in bytes type
	when loading property list data with use_builtin_types=False.
	"""

	def __init__(self, data):
	if not isinstance(data, bytes):
	raise TypeError("Expected bytes, found %s" % type(data).__name__)
	self.data = data

	@classmethod
	def fromBase64(cls, data):
	return cls(b64decode(data))

	def asBase64(self, maxlinelength=76, indent_level=1):
	return _encode_base64(
	self.data, maxlinelength=maxlinelength, indent_level=indent_level
	)

	def __eq__(self, other):
	if isinstance(other, self.__class__):
	return self.data == other.data
	elif isinstance(other, bytes):
	return self.data == other
	else:
	return NotImplemented

	def __repr__(self):
	return "%s(%s)" % (self.__class__.__name__, repr(self.data))


	class PlistTarget:
	""" Event handler using the ElementTree Target API that can be
	passed to a XMLParser to produce property list objects from XML.
	It is based on the CPython plistlib module's _PlistParser class,
	but does not use the expat parser.

	>>> from fontTools.misc import etree
	>>> parser = etree.XMLParser(target=PlistTarget())
	>>> result = etree.XML(
	... "<dict>"
	... " <key>something</key>"
	... " <string>blah</string>"
	... "</dict>",
	... parser=parser)
	>>> result == {"something": "blah"}
	True

	Links:
	https://github.com/python/cpython/blob/master/Lib/plistlib.py
	http://lxml.de/parsing.html#the-target-parser-interface
	"""

	def __init__(self, use_builtin_types=None, dict_type=dict):
	self.stack = []
	self.current_key = None
	self.root = None
	if use_builtin_types is None:
	self._use_builtin_types = USE_BUILTIN_TYPES
	else:
	if use_builtin_types is False:
	warnings.warn(
	"Setting use_builtin_types to False is deprecated and will be "
	"removed soon.",
	DeprecationWarning,
	)
	self._use_builtin_types = use_builtin_types
	self._dict_type = dict_type

	def start(self, tag, attrib):
	self._data = []
	handler = _TARGET_START_HANDLERS.get(tag)
	if handler is not None:
	handler(self)

	def end(self, tag):
	handler = _TARGET_END_HANDLERS.get(tag)
	if handler is not None:
	handler(self)

	def data(self, data):
	self._data.append(data)

	def close(self):
	return self.root

	# helpers

	def add_object(self, value):
	if self.current_key is not None:
	if not isinstance(self.stack[-1], type({})):
	raise ValueError("unexpected element: %r" % self.stack[-1])
	self.stack[-1][self.current_key] = value
	self.current_key = None
	elif not self.stack:
	# this is the root object
	self.root = value
	else:
	if not isinstance(self.stack[-1], type([])):
	raise ValueError("unexpected element: %r" % self.stack[-1])
	self.stack[-1].append(value)

	def get_data(self):
	data = "".join(self._data)
	self._data = []
	return data


	# event handlers


	def start_dict(self):
	d = self._dict_type()
	self.add_object(d)
	self.stack.append(d)


	def end_dict(self):
	if self.current_key:
	raise ValueError("missing value for key '%s'" % self.current_key)
	self.stack.pop()


	def end_key(self):
	if self.current_key or not isinstance(self.stack[-1], type({})):
	raise ValueError("unexpected key")
	self.current_key = self.get_data()


	def start_array(self):
	a = []
	self.add_object(a)
	self.stack.append(a)


	def end_array(self):
	self.stack.pop()


	def end_true(self):
	self.add_object(True)


	def end_false(self):
	self.add_object(False)


	def end_integer(self):
	self.add_object(int(self.get_data()))


	def end_real(self):
	self.add_object(float(self.get_data()))


	def end_string(self):
	self.add_object(self.get_data())


	def end_data(self):
	if self._use_builtin_types:
	self.add_object(b64decode(self.get_data()))
	else:
	self.add_object(Data.fromBase64(self.get_data()))


	def end_date(self):
	self.add_object(_date_from_string(self.get_data()))


	_TARGET_START_HANDLERS = {"dict": start_dict, "array": start_array}

	_TARGET_END_HANDLERS = {
	"dict": end_dict,
	"array": end_array,
	"key": end_key,
	"true": end_true,
	"false": end_false,
	"integer": end_integer,
	"real": end_real,
	"string": end_string,
	"data": end_data,
	"date": end_date,
	}


	# functions to build element tree from plist data


	def _string_element(value, ctx):
	el = etree.Element("string")
	el.text = value
	return el


	def _bool_element(value, ctx):
	if value:
	return etree.Element("true")
	else:
	return etree.Element("false")


	def _integer_element(value, ctx):
	if -1 << 63 <= value < 1 << 64:
	el = etree.Element("integer")
	el.text = "%d" % value
	return el
	else:
	raise OverflowError(value)


	def _real_element(value, ctx):
	el = etree.Element("real")
	el.text = repr(value)
	return el


	def _dict_element(d, ctx):
	el = etree.Element("dict")
	items = d.items()
	if ctx.sort_keys:
	items = sorted(items)
	ctx.indent_level += 1
	for key, value in items:
	if not isinstance(key, str):
	if ctx.skipkeys:
	continue
	raise TypeError("keys must be strings")
	k = etree.SubElement(el, "key")
	k.text = tounicode(key, "utf-8")
	el.append(_make_element(value, ctx))
	ctx.indent_level -= 1
	return el


	def _array_element(array, ctx):
	el = etree.Element("array")
	if len(array) == 0:
	return el
	ctx.indent_level += 1
	for value in array:
	el.append(_make_element(value, ctx))
	ctx.indent_level -= 1
	return el


	def _date_element(date, ctx):
	el = etree.Element("date")
	el.text = _date_to_string(date)
	return el


	def _data_element(data, ctx):
	el = etree.Element("data")
	el.text = _encode_base64(
	data,
	maxlinelength=(76 if ctx.pretty_print else None),
	indent_level=ctx.indent_level,
	)
	return el


	def _string_or_data_element(raw_bytes, ctx):
	if ctx.use_builtin_types:
	return _data_element(raw_bytes, ctx)
	else:
	try:
	string = raw_bytes.decode(encoding="ascii", errors="strict")
	except UnicodeDecodeError:
	raise ValueError(
	"invalid non-ASCII bytes; use unicode string instead: %r"
	% raw_bytes
	)
	return _string_element(string, ctx)


	@singledispatch
	def _make_element(value, ctx):
	raise TypeError("unsupported type: %s" % type(value))

	_make_element.register(str)(_string_element)
	_make_element.register(bool)(_bool_element)
	_make_element.register(Integral)(_integer_element)
	_make_element.register(float)(_real_element)
	_make_element.register(Mapping)(_dict_element)
	_make_element.register(list)(_array_element)
	_make_element.register(tuple)(_array_element)
	_make_element.register(datetime)(_date_element)
	_make_element.register(bytes)(_string_or_data_element)
	_make_element.register(bytearray)(_data_element)
	_make_element.register(Data)(lambda v, ctx: _data_element(v.data, ctx))


	# Public functions to create element tree from plist-compatible python
	# data structures and viceversa, for use when (de)serializing GLIF xml.


	def totree(
	value,
	sort_keys=True,
	skipkeys=False,
	use_builtin_types=None,
	pretty_print=True,
	indent_level=1,
	):
	if use_builtin_types is None:
	use_builtin_types = USE_BUILTIN_TYPES
	else:
	use_builtin_types = use_builtin_types
	context = SimpleNamespace(
	sort_keys=sort_keys,
	skipkeys=skipkeys,
	use_builtin_types=use_builtin_types,
	pretty_print=pretty_print,
	indent_level=indent_level,
	)
	return _make_element(value, context)


	def fromtree(tree, use_builtin_types=None, dict_type=dict):
	target = PlistTarget(
	use_builtin_types=use_builtin_types, dict_type=dict_type
	)
	for action, element in etree.iterwalk(tree, events=("start", "end")):
	if action == "start":
	target.start(element.tag, element.attrib)
	elif action == "end":
	# if there are no children, parse the leaf's data
	if not len(element):
	# always pass str, not None
	target.data(element.text or "")
	target.end(element.tag)
	return target.close()


	# python3 plistlib API


	def load(fp, use_builtin_types=None, dict_type=dict):
	if not hasattr(fp, "read"):
	raise AttributeError(
	"'%s' object has no attribute 'read'" % type(fp).__name__
	)
	target = PlistTarget(
	use_builtin_types=use_builtin_types, dict_type=dict_type
	)
	parser = etree.XMLParser(target=target)
	result = etree.parse(fp, parser=parser)
	# lxml returns the target object directly, while ElementTree wraps
	# it as the root of an ElementTree object
	try:
	return result.getroot()
	except AttributeError:
	return result


	def loads(value, use_builtin_types=None, dict_type=dict):
	fp = BytesIO(value)
	return load(fp, use_builtin_types=use_builtin_types, dict_type=dict_type)


	def dump(
	value,
	fp,
	sort_keys=True,
	skipkeys=False,
	use_builtin_types=None,
	pretty_print=True,
	):
	if not hasattr(fp, "write"):
	raise AttributeError(
	"'%s' object has no attribute 'write'" % type(fp).__name__
	)
	root = etree.Element("plist", version="1.0")
	el = totree(
	value,
	sort_keys=sort_keys,
	skipkeys=skipkeys,
	use_builtin_types=use_builtin_types,
	pretty_print=pretty_print,
	)
	root.append(el)
	tree = etree.ElementTree(root)
	# we write the doctype ourselves instead of using the 'doctype' argument
	# of 'write' method, becuse lxml will force adding a '\n' even when
	# pretty_print is False.
	if pretty_print:
	header = b"\n".join((XML_DECLARATION, PLIST_DOCTYPE, b""))
	else:
	header = XML_DECLARATION + PLIST_DOCTYPE
	fp.write(header)
	tree.write(
	fp, encoding="utf-8", pretty_print=pretty_print, xml_declaration=False
	)


	def dumps(
	value,
	sort_keys=True,
	skipkeys=False,
	use_builtin_types=None,
	pretty_print=True,
	):
	fp = BytesIO()
	dump(
	value,
	fp,
	sort_keys=sort_keys,
	skipkeys=skipkeys,
	use_builtin_types=use_builtin_types,
	pretty_print=pretty_print,
	)
	return fp.getvalue()