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gh-128136: Possibility to customize hardcoded xml declaration #128095

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wants to merge 12 commits into from
15 changes: 13 additions & 2 deletions Lib/xml/etree/ElementTree.py
Original file line number Diff line number Diff line change
Expand Up @@ -679,6 +679,7 @@ def iterfind(self, path, namespaces=None):
def write(self, file_or_filename,
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This should add a unit test to test it's behavior. Verify it whether the requirements are met.

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Added some unit tests but there is'nt an issu to add an issue title.

and i think the change has little impact on Python users.

encoding=None,
xml_declaration=None,
xml_declaration_definition="<?xml version='{version}' encoding='{encoding}'?>",
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default_namespace=None,
method=None, *,
short_empty_elements=True):
Expand All @@ -694,6 +695,14 @@ def write(self, file_or_filename,
is added if encoding IS NOT either of:
US-ASCII, UTF-8, or Unicode

*xml_declaration_definition* -- string for customizing encoding declaration
as documentation always shows doublequotes but
singlequote where hardcoded here.
to be rfc conform which allows doublequotes and
singlequote for declaration. default value is
untouched to pass tests.
placeholders: {version}, {encoding}

*default_namespace* -- sets the default XML namespace (for "xmlns")

*method* -- either "xml" (default), "html, "text", or "c14n"
Expand All @@ -719,8 +728,10 @@ def write(self, file_or_filename,
(xml_declaration is None and
encoding.lower() != "unicode" and
declared_encoding.lower() not in ("utf-8", "us-ascii"))):
write("<?xml version='1.0' encoding='%s'?>\n" % (
declared_encoding,))
# version configuration is'nt necessary, can be overwritten
# in declaration_definition at runtime
data = {'version':'1.0', 'encoding': declared_encoding}
write(xml_declaration_definition.format(**data)+"\n")
if method == "text":
_serialize_text(write, self._root)
else:
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