Make the setter method private.

Author: serhiy-storchaka

Doc/library/html.parser.rst

@@ -121,17 +121,6 @@ The output will then be:
    attributes can be preserved, etc.).
 
 
-.. method:: HTMLParser.support_cdata(flag)
-
-   Sets how the parser will parse CDATA declarations.
-   If *flag* is true, then the :meth:`unknown_decl` method will be called
-   for the CDATA section ``<![CDATA[...]]>``.
-   If *flag* is false, then the :meth:`handle_comment` method will be called
-   for ``<![CDATA[...>``.
-
-   .. versionadded:: 3.13.6
-
-
 The following methods are called when data or markup elements are encountered
 and they are meant to be overridden in a subclass.  The base class
 implementations do nothing (except for :meth:`~HTMLParser.handle_startendtag`):

Lib/html/parser.py

@@ -184,7 +184,17 @@ def clear_cdata_mode(self):
         self.cdata_elem = None
         self._escapable = True
 
-    def support_cdata(self, flag=True):
+    def _set_support_cdata(self, flag=True):
+        """Enable or disable support of the CDATA sections.
+        If enabled, "<[CDATA[" starts a CDATA section which ends with "]]>".
+        If disabled, "<[CDATA[" starts a bogus comments which ends with ">".
+
+        This method is not called by default. Its purpose is to be called
+        in custom handle_starttag() and handle_endtag() methods, with
+        value that depends on the adjusted current node.
+        See https://html.spec.whatwg.org/multipage/parsing.html#markup-declaration-open-state
+        for details.
+        """
         self._support_cdata = flag
 
     # Internal -- handle data as far as reasonable.  May leave state

Lib/test/test_htmlparser.py

@@ -16,7 +16,7 @@ def __init__(self, *args, autocdata=False, **kw):
         self.append = self.events.append
         html.parser.HTMLParser.__init__(self, *args, **kw)
         if autocdata:
-            self.support_cdata(False)
+            self._set_support_cdata(False)
 
     def get_events(self):
         # Normalize the list of events so that buffer artefacts don't
@@ -38,15 +38,15 @@ def get_events(self):
     def handle_starttag(self, tag, attrs):
         self.append(("starttag", tag, attrs))
         if self.autocdata and tag == 'svg':
-            self.support_cdata(True)
+            self._set_support_cdata(True)
 
     def handle_startendtag(self, tag, attrs):
         self.append(("startendtag", tag, attrs))
 
     def handle_endtag(self, tag):
         self.append(("endtag", tag))
         if self.autocdata and tag == 'svg':
-            self.support_cdata(False)
+            self._set_support_cdata(False)
 
     # all other markup