'\n \n document = BSXPathEvaluator(html)\n \n result = document.evaluate('//h1/text()[1]',document,None,XPathResult.STRING_TYPE,None)\n print result.stringValue\n # Hello, DOM 3 XPath!\n\n result = document.evaluate('//h1',document,None,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,None)\n print result.snapshotLength\n # 1\n print result.snapshotItem(0)\n #
\n \n nodes = document.getItemList('//p')\n print len(nodes)\n # 2\n print nodes\n # [
This is XPathEvaluator Extension for BeautifulSoup.
,
This is based on JavaScript-XPath!
]\n \n first = document.getFirstItem('//p')\n print first\n #
This is XPathEvaluator Extension for BeautifulSoup.
\n\n\nNotice:\n - This is based on JavaScript-XPath (c) 2007 Cybozu Labs, Inc. (http://coderepos.org/share/wiki/JavaScript-XPath)\n - Required:\n - Python 2.5+\n - BeautifulSoup 3.0.7+(recommended) or 3.1.0+\n\n\"\"\"\nimport re,types,math,datetime\n#import logging\nfrom BeautifulSoup import *\n\ntry:\n if DEFAULT_OUTPUT_ENCODING:\n pass\nexcept:\n DEFAULT_OUTPUT_ENCODING='utf-8'\n\n\n#***** Optional Parameters\nUSE_NODE_CACHE=True\nUSE_NODE_INDEX=True\n\n\n#***** General Functions\ndef throwError(str):\n raise ValueError, str\n \n\ndef typeof(obj):\n if isinstance(obj,bool):\n return 'boolean'\n if isinstance(obj,int) or isinstance(obj,float):\n return 'number'\n if isinstance(obj,basestring):\n return 'string'\n if isinstance(obj,types.FunctionType):\n return 'function'\n return 'object'\n\n\ndef isNaN(obj):\n if isinstance(obj,int) or isinstance(obj,float):\n return False\n if not isinstance(obj,basestring):\n return True\n if obj.isdigit():\n return False\n try:\n float(obj)\n return False\n except:\n return True\n\n\ndef toNumber(obj):\n if isinstance(obj,int) or isinstance(obj,float):\n return obj\n if isinstance(obj,basestring):\n if obj.isdigit():\n return int(obj)\n try:\n return float(obj)\n except:\n return obj\n return obj\n\ndef toBoolean(obj):\n return bool(obj)\n\n\ndef toString(obj):\n if isinstance(obj,bool):\n #return u'true' if obj else u'false'\n if obj:\n return u'true'\n else:\n return u'false'\n if isinstance(obj,str) or isinstance(obj,int) or isinstance(obj,float):\n return unicode(obj)\n return obj\n\n\n\n#***** General Classes\nclass ExtDict(dict):\n def __getattr__(self,name):\n try:\n attr=super(ExtDict,self).__getattr__(name)\n except:\n if not self.has_key(name):\n raise AttributeError,name\n attr=self.get(name)\n return attr\n\n\n\n#***** Common Definitions\nindent_space=' '\n\n\n#{ // Regular Expressions\nre_has_ualpha=re.compile(r'(?![0-9])[\\w]')\nre_seqspace=re.compile(r'\\s+')\nre_firstspace=re.compile(r'^\\s')\nre_lastspace=re.compile(r'\\s$')\n#} // end of Regular Expressions\n\n\n#{ // NodeTypeDOM\nNodeTypeDOM=ExtDict({\n 'ANY_NODE' :0\n, 'ELEMENT_NODE' :1\n, 'ATTRIBUTE_NODE' :2\n, 'TEXT_NODE' :3\n, 'CDATA_SECTION_NODE' :4\n, 'ENTITY_REFERENCE_NODE' :5\n, 'ENTITY_NODE' :6\n, 'PROCESSING_INSTRUCTION_NODE':7\n, 'COMMENT_NODE' :8\n, 'DOCUMENT_NODE' :9\n, 'DOCUMENT_TYPE_NODE' :10\n, 'DOCUMENT_FRAGMENT_NODE' :11\n, 'NOTATION_NODE' :12\n})\n\nNodeTypeBS=ExtDict({\n 'BSXPathEvaluator' :NodeTypeDOM.DOCUMENT_NODE\n, 'NavigableString' :NodeTypeDOM.TEXT_NODE\n, 'CData' :NodeTypeDOM.CDATA_SECTION_NODE\n, 'ProcessingInstruction':NodeTypeDOM.PROCESSING_INSTRUCTION_NODE\n, 'Comment' :NodeTypeDOM.COMMENT_NODE\n, 'Declaration' :NodeTypeDOM.ANY_NODE\n, 'Tag' :NodeTypeDOM.ELEMENT_NODE\n})\n#} // end of NodeTypeDOM\n\n\n#{ // NodeUtil\ndef makeNodeUtils():\n re_type_document_type=re.compile(r'^DOCTYPE\\s')\n re_type_entity =re.compile(r'^ENTITY\\s')\n re_type_notation =re.compile(r'^NOTATION\\s')\n \n #re_processing_instruction=re.compile(r'^(.*?)\\s+(.*?)\\?*$')\n re_processing_instruction=re.compile(r'^(.*?)(\\s+.*?)\\?*$')\n \n re_declaration_name=re.compile(r'^([^\\s]+)\\s+([\\%]?)\\s*([^\\s]+)\\s')\n \n def makeNU_BS():\n def _nodeType(node):\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n return node.nodeType\n nodeType=NodeTypeBS.get(node.__class__.__name__)\n if nodeType==NodeTypeDOM.ANY_NODE:\n str=NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING)\n if re_type_document_type.search(str):\n nodeType=NodeTypeDOM.DOCUMENT_TYPE_NODE\n elif re_type_entity.search(str):\n nodeType=NodeTypeDOM.ENTITY_NODE\n elif re_type_notation.search(str):\n nodeType=NodeTypeDOM.NOTATION_NODE\n return nodeType\n \n def _nodeName(node):\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n return node.nodeName.lower()\n nodeType=_nodeType(node)\n if nodeType==NodeTypeDOM.DOCUMENT_NODE:\n return '#document'\n elif nodeType==NodeTypeDOM.TEXT_NODE:\n return '#text'\n elif nodeType==NodeTypeDOM.CDATA_SECTION_NODE:\n return '#cdata-section'\n elif nodeType==NodeTypeDOM.PROCESSING_INSTRUCTION_NODE:\n mrslt=re_processing_instruction.search(NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING))\n if mrslt:\n return mrslt.group(1)\n else:\n return NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING)\n elif nodeType==NodeTypeDOM.COMMENT_NODE:\n return '#comment'\n elif nodeType==NodeTypeDOM.DOCUMENT_TYPE_NODE or nodeType==NodeTypeDOM.ENTITY_NODE or nodeType==NodeTypeDOM.NOTATION_NODE:\n mrslt=re_declaration_name.search(NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING))\n if mrslt:\n return mrslt.group(2)\n else:\n return NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING)\n else:\n return node.name.lower()\n \n def _nodeValue(node):\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n return node.nodeValue\n nodeType=_nodeType(node)\n if nodeType==NodeTypeDOM.CDATA_SECTION_NODE or \\\n nodeType==NodeTypeDOM.COMMENT_NODE or \\\n nodeType==NodeTypeDOM.TEXT_NODE:\n return NavigableString.encode(node, DEFAULT_OUTPUT_ENCODING)\n if nodeType==NodeTypeDOM.PROCESSING_INSTRUCTION_NODE:\n mrslt=re_processing_instruction.search(NavigableString.encode(node,DEFAULT_OUTPUT_ENCODING))\n if mrslt:\n return mrslt.group(2)\n else:\n return None\n return None\n \n def _nodeAttrValue(node,attrName):\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n return None\n nodeType=_nodeType(node)\n if nodeType!=NodeTypeDOM.ELEMENT_NODE:\n return None\n return node.get(attrName)\n \n def _parentNode(node):\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n return node.parentNode\n return node.parent\n \n def _ownerDocument(node):\n owner=getattr(node,'_owner',None)\n if owner:\n return owner\n if getattr(node,'nodeType',None)==NodeTypeDOM.ATTRIBUTE_NODE:\n owner=node.parentNode\n else:\n owner=node\n while True:\n parent=owner.parent\n if not parent:\n break\n owner=parent\n try:\n node._owner=owner\n except:\n pass\n return owner\n \n def pairwise(iterable):\n itnext = iter(iterable).next\n while True:\n yield itnext(), itnext()\n \n def _attributes(node):\n if _nodeType(node)==NodeTypeDOM.ELEMENT_NODE:\n #return node._getAttrMap()\n if not getattr(node,'attrMap'):\n node.attrMap=dict(pairwise(node.attrs))\n return node.attrMap\n else:\n return None\n \n def _contains(node,cnode):\n if _nodeType(node)==NodeTypeDOM.ATTRIBUTE_NODE: node=node.parentNode\n if _nodeType(cnode)==NodeTypeDOM.ATTRIBUTE_NODE: cnode=cnode.parentNode\n return node in cnode.findParents()\n \n def _preceding(node,cnode):\n if _nodeType(node)==NodeTypeDOM.ATTRIBUTE_NODE: node=node.parentNode\n if _nodeType(cnode)==NodeTypeDOM.ATTRIBUTE_NODE: cnode=cnode.parentNode\n #return cnode in node.findAllPrevious()\n return cnode in node.findPreviousSiblings()\n \n def _following(node,cnode):\n if _nodeType(node)==NodeTypeDOM.ATTRIBUTE_NODE: node=node.parentNode\n if _nodeType(cnode)==NodeTypeDOM.ATTRIBUTE_NODE: cnode=cnode.parentNode\n #return cnode in node.findAllNext()\n return cnode in node.findNextSiblings()\n \n def d_getattr(self,name):\n raise AttributeError,name\n \n #{ // ExtPageElement\n class ExtPageElement:\n def __getattr__(self,name):\n if name=='nodeType': return _nodeType(self)\n if name=='nodeName': return _nodeName(self)\n if name=='nodeValue': return _nodeValue(self)\n if name=='parentNode': return _parentNode(self)\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return _attributes(self)\n if name=='get': return self.get\n if name=='contains': return self.contains\n if name=='preceding': return self.preceding\n if name=='following': return self.following\n d_getattr(self,name)\n \n def get(self,key,default=None):\n return _nodeAttrValue(self,key)\n \n def contains(self,cnode):\n return _contains(self,cnode)\n \n def preceding(self,cnode):\n return _preceding(self,cnode)\n \n def following(self,cnode):\n return _following(self,cnode)\n \n PageElement.__bases__+=(ExtPageElement,)\n BeautifulSoup.__bases__+=(ExtPageElement,)\n NavigableString.__bases__+=(ExtPageElement,)\n CData.__bases__+=(ExtPageElement,)\n ProcessingInstruction.__bases__+=(ExtPageElement,)\n Comment.__bases__+=(ExtPageElement,)\n Declaration.__bases__+=(ExtPageElement,)\n Tag.__bases__+=(ExtPageElement,)\n \n #} // ExtPageElement\n \n #{ // _extBeautifulSoup\n def _extBeautifulSoup():\n o_getattr=getattr(BeautifulSoup,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.DOCUMENT_NODE\n if name=='nodeName': return '#document'\n if name=='nodeValue': return None\n if name=='parentNode': return None\n if name=='ownerDocument': return None\n if name=='attributes': return None\n return o_getattr(self,name)\n BeautifulSoup.__getattr__=e_getattr\n _extBeautifulSoup()\n #} // _extBeautifulSoup\n \n #{ // _extNavigableString\n def _extNavigableString():\n o_getattr=getattr(NavigableString,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.TEXT_NODE\n if name=='nodeName': return '#text'\n if name=='nodeValue': return NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return None\n return o_getattr(self,name)\n NavigableString.__getattr__=e_getattr\n _extNavigableString()\n #} // _extNavigableString\n \n #{ // _extCData\n def _extCData():\n o_getattr=getattr(CData,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.CDATA_SECTION_NODE\n if name=='nodeName': return '#cdata-section'\n if name=='nodeValue': return NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return None\n return o_getattr(self,name)\n CData.__getattr__=e_getattr\n _extCData()\n #} // _extCData\n \n #{ // _extProcessingInstruction\n def _extProcessingInstruction():\n o_getattr=getattr(ProcessingInstruction,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.PROCESSING_INSTRUCTION_NODE\n if name=='nodeName':\n mrslt=re_processing_instruction.search(NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING))\n #return mrslt.group(1) if mrslt else NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if mrslt:\n return mrslt.group(1)\n else:\n return NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if name=='nodeValue':\n mrslt=re_processing_instruction.search(NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING))\n #return mrslt.group(2) if mrslt else None\n if mrslt:\n return mrslt.group(2)\n else:\n return None\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return None\n return o_getattr(self,name)\n ProcessingInstruction.__getattr__=e_getattr\n _extProcessingInstruction()\n #} // _extProcessingInstruction\n \n #{ // _extComment\n def _extComment():\n o_getattr=getattr(Comment,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.COMMENT_NODE\n if name=='nodeName': return '#comment'\n if name=='nodeValue': return NavigableString.encode(self, DEFAULT_OUTPUT_ENCODING)\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return None\n return o_getattr(self,name)\n Comment.__getattr__=e_getattr\n _extComment()\n #} // _extComment\n \n #{ // _extDeclaration\n def _extDeclaration():\n o_getattr=getattr(Declaration,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType':\n str=NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if re_type_document_type.search(str):\n return NodeTypeDOM.DOCUMENT_TYPE_NODE\n elif re_type_entity.search(str):\n return NodeTypeDOM.ENTITY_NODE\n elif re_type_notation.search(str):\n return NodeTypeDOM.NOTATION_NODE\n else:\n return NodeTypeDOM.ANY_NODE\n if name=='nodeName':\n mrslt=re_declaration_name.search(NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING))\n #return mrslt.group(2) if mrslt else NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if mrslt:\n return mrslt.group(2) \n else: \n return NavigableString.encode(self,DEFAULT_OUTPUT_ENCODING)\n if name=='nodeValue': return None\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return None\n return o_getattr(self,name)\n Declaration.__getattr__=e_getattr\n _extDeclaration()\n #} // _extDeclaration\n \n #{ // _extTag\n def _extTag():\n o_getattr=getattr(Tag,'__getattr__',d_getattr)\n def e_getattr(self,name):\n if name=='nodeType': return NodeTypeDOM.ELEMENT_NODE\n if name=='nodeName': return self.name.lower()\n if name=='nodeValue': return None\n if name=='parentNode': return self.parent\n if name=='ownerDocument': return _ownerDocument(self)\n if name=='attributes': return self._getAttrMap()\n return o_getattr(self,name)\n Tag.__getattr__=e_getattr\n _extTag()\n #} // _extTag\n \n def _it_deepNodes(node):\n child_next=iter(getattr(node,'contents',[])).next\n while True:\n child=child_next()\n yield child\n for gchild in _it_deepNodes(child):\n yield gchild\n \n return ExtDict({\n 'nodeType' :_nodeType\n , 'nodeName' :_nodeName\n , 'nodeValue' :_nodeValue\n , 'nodeAttrValue':_nodeAttrValue\n , 'parentNode' :_parentNode\n , 'ownerDocument':_ownerDocument\n , 'attributes' :_attributes\n , 'contains' :_contains\n , 'preceding' :_preceding\n , 'following' :_following\n , 'it_deepNodes' :_it_deepNodes\n })\n return\n \n def makeNU():\n def _to(valueType,node):\n if typeof(node)=='string':\n result=node\n else:\n nodeType=node.nodeType\n if nodeType==NodeTypeDOM.ATTRIBUTE_NODE:\n result=node.nodeValue\n else:\n strings=[]\n for _node in NodeUtilBS.it_deepNodes(node):\n if _node.nodeType==NodeTypeDOM.TEXT_NODE:\n strings.append(unicode(_node))\n result=''.join(strings)\n \n if valueType=='number':\n return toNumber(result)\n elif valueType=='boolean':\n return toBoolean(result)\n else:\n return result\n \n def _attrMatch(node,attrName,attrValue):\n if not attrName or \\\n not attrValue and node.get(attrName) or \\\n (attrValue and node.get(attrName)==attrValue):\n return True\n else:\n return False\n \n def _getDescendantNodes(test,node,nodeset,attrName,attrValue,prevNodeset,prevIndex):\n if prevNodeset:\n prevNodeset.delDescendant(node,prevIndex)\n \n if USE_NODE_CACHE:\n _cachemap=getattr(node,'_cachemap',None)\n if not _cachemap:\n _cachemap=node._cachemap=ExtDict({'attrib':ExtDict({}),'all':None,'tag':ExtDict({})})\n \n if attrValue and attrName:\n _cm=_cachemap.attrib\n _anmap=_cm.get(attrName)\n if not _anmap:\n _anmap=_cm[attrName]=ExtDict({})\n nodes=_anmap.get(attrValue)\n if not nodes:\n nodes=_anmap[attrValue]=[]\n if getattr(node,'findAll',None):\n nodes.extend(node.findAll(attrs={attrName:attrValue}))\n for elm in nodes:\n if test.match(elm):\n nodeset.push(elm)\n \n elif getattr(test,'notOnlyElement',None):\n nodes=_cachemap.all\n if not nodes:\n nodes=_cachemap.all=[]\n for elm in NodeUtilBS.it_deepNodes(node):\n nodes.append(elm)\n \n for elm in nodes:\n if NodeUtil.attrMatch(elm,attrName,attrValue) and test.match(elm):\n nodeset.push(elm)\n \n else:\n nodeType=node.nodeType\n if nodeType==NodeTypeDOM.ELEMENT_NODE or nodeType==NodeTypeDOM.DOCUMENT_NODE:\n _cm=_cachemap.tag\n name=getattr(test,'name',None)\n if not name or name=='*':\n nodes=_cm.get('*')\n if not nodes:\n nodes=_cm['*']=node.findAll()\n else:\n nodes=_cm.get(name)\n if not nodes:\n nodes=_cm[name]=node.findAll([name])\n for elm in nodes:\n if NodeUtil.attrMatch(elm,attrName,attrValue):\n nodeset.push(elm)\n \n else: # USE_NODE_CACHE is False\n if attrValue and attrName:\n if getattr(node,'findAll',None):\n for elm in node.findAll(attrs={attrName:attrValue}):\n if test.match(elm):\n nodeset.push(elm)\n \n elif getattr(test,'notOnlyElement',None):\n for elm in NodeUtilBS.it_deepNodes(node):\n if NodeUtil.attrMatch(elm,attrName,attrValue) and test.match(elm):\n nodeset.push(elm)\n \n else:\n nodeType=node.nodeType\n if nodeType==NodeTypeDOM.ELEMENT_NODE or nodeType==NodeTypeDOM.DOCUMENT_NODE:\n name=getattr(test,'name',None)\n if not name or name=='*':\n nodes=node.findAll()\n else:\n nodes=node.findAll([name])\n for elm in nodes:\n if NodeUtil.attrMatch(elm,attrName,attrValue):\n nodeset.push(elm)\n \n return nodeset\n \n def _getChildNodes(test,node,nodeset,attrName,attrValue,prevNodeset,prevIndex):\n contents=getattr(node,'contents',[])\n for elm in contents:\n if NodeUtil.attrMatch(elm,attrName,attrValue) and test.match(elm):\n nodeset.push(elm)\n \n return nodeset\n \n return ExtDict({\n 'to' :_to\n , 'attrMatch' :_attrMatch\n , 'getDescendantNodes':_getDescendantNodes\n , 'getChildNodes' :_getChildNodes\n })\n \n return (makeNU_BS(),makeNU())\n \n(NodeUtilBS,NodeUtil)=makeNodeUtils()\n\n#} // end of NodeUtil\n\n\n\n#***** Application Classes\n#{ // Lexer\nclass Lexer(object):\n def __init__(self,source):\n tokens=self.tokens=[]\n def anlz_token(mrslt):\n token=mrslt.group()\n if not self.re_strip.search(token):\n tokens.append(token)\n return token\n self.re_token.sub(anlz_token,source,count=0)\n self.index=0\n \n def peek(self,i=0):\n #token=self.tokens[self.index+i] if self.index+i text before
text after