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xml.dom.minidom: add more __slots__ to limit resource usage.

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This commit is contained in:
Florent Xicluna 2012-03-05 12:37:02 +01:00
parent 6c75301eb6
commit 8cf4b51fa4
2 changed files with 8 additions and 6 deletions
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1
Lib/xml/dom/__init__.py
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@ -17,6 +17,7 @@
class Node: class Node:
"""Class giving the NodeType constants.""" """Class giving the NodeType constants."""
__slots__ = ()
# DOM implementations may use this as a base class for their own # DOM implementations may use this as a base class for their own
# Node implementations. If they don't, the constants defined here # Node implementations. If they don't, the constants defined here

13
Lib/xml/dom/minidom.py
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@ -62,10 +62,7 @@ def toprettyxml(self, indent="\t", newl="\n", encoding=None):
return writer.stream.getvalue() return writer.stream.getvalue()
def hasChildNodes(self): def hasChildNodes(self):
if self.childNodes: return bool(self.childNodes)
return True
else:
return False
def _get_childNodes(self): def _get_childNodes(self):
return self.childNodes return self.childNodes
@ -930,6 +927,7 @@ class Childless:
"""Mixin that makes childless-ness easy to implement and avoids """Mixin that makes childless-ness easy to implement and avoids
the complexity of the Node methods that deal with children. the complexity of the Node methods that deal with children.
""" """
__slots__ = ()
attributes = None attributes = None
childNodes = EmptyNodeList() childNodes = EmptyNodeList()
@ -1067,6 +1065,8 @@ def replaceData(self, offset, count, arg):
class Text(CharacterData): class Text(CharacterData):
__slots__ = ()
nodeType = Node.TEXT_NODE nodeType = Node.TEXT_NODE
nodeName = "#text" nodeName = "#text"
attributes = None attributes = None
@ -1188,6 +1188,8 @@ def writexml(self, writer, indent="", addindent="", newl=""):
class CDATASection(Text): class CDATASection(Text):
__slots__ = ()
nodeType = Node.CDATA_SECTION_NODE nodeType = Node.CDATA_SECTION_NODE
nodeName = "#cdata-section" nodeName = "#cdata-section"
@ -1266,8 +1268,7 @@ def __setstate__(self, state):
class Identified: class Identified:
"""Mix-in class that supports the publicId and systemId attributes.""" """Mix-in class that supports the publicId and systemId attributes."""
# XXX this does not work, this is an old-style class __slots__ = 'publicId', 'systemId'
# __slots__ = 'publicId', 'systemId'
def _identified_mixin_init(self, publicId, systemId): def _identified_mixin_init(self, publicId, systemId):
self.publicId = publicId self.publicId = publicId