B d|@s dZddlZddlZddlZddlmZddlmZddl m Z ddl m Z ddlmZmZmZdd lmZddlZdd lmZd Zd eZd ZGdddeZGdddeZGdddeZGdddeZ ddZ!Gdddej"Z#Gddde Z$GdddeZ%GdddeZ&Gd d!d!e Z'Gd"d#d#e Z(Gd$d%d%e Z)Gd&d'd'eZ*Gd(d)d)eZ+Gd*d+d+e Z,Gd,d-d-e Z-Gd.d/d/e Z.Gd0d1d1e Z/Gd2d3d3eZ0Gd4d5d5e Z1Gd6d7d7ej2j3eZ4Gd8d9d9e4Z5Gd:d;d;e4Z6da2 This module provides class definitions corresponding to the elements that can be found in a LIGO Light Weight XML file. It also provides a class representing an entire LIGO Light Weight XML document, a ContentHandler class for use with SAX2 parsers, and a convenience function for constructing a parser. N)sax)AttributesImpl)escape)unescape) __author____date__ __version__)types)reducezAhttp://ldas-sw.ligo.caltech.edu/doc/ligolwAPI/html/ligolw_dtd.txtzE  c@seZdZdZdS) ElementErrorz4 Base class for exceptions generated by elements. N)__name__ __module__ __qualname____doc__rr[/work/yifan.wang/ringdown/master-ringdown-env/lib/python3.7/site-packages/ligo/lw/ligolw.pyr Osr cs:eZdZdZejejddffdd ZeddZZ S)attributeproxyaw Expose an XML attribute of an Element subclass as Python instance attribute with support for an optional default value. The .getAttribute() and .setAttribute() methods of the instance to which this is attached are used to retrieve and set the unicode attribute value, respectively. When retrieving a value, the function given via the dec keyword argument will be used to convert the unicode into a native Python object (the default is to leave the unicode value as unicode). When setting a value, the function given via the enc keyword argument will be used to convert a native Python object to a unicode string. When retrieving a value, if .getAttribute() raises KeyError then AttributeError is raised unless a default value is provided in which case it is returned instead. If doc is provided it will be used as the documentation string, otherwise a default documentation string will be constructed identifying the attribute's name and explaining the default value if one is set. NOTE: If an XML document is parsed and an element is encountered that does not have a value set for an attribute whose corresponding attributeproxy has a default value defined, then Python codes will be told the default value. Therefore, the default value given here must match what the XML DTD says the default value is for that attribute. Likewise, attributes for which the DTD does not define a default must not have a default defined here. These conditions must both be met to not create a discrepancy between the behaviour of Python codes relying on this I/O library and other interfaces to the same document. Example: >>> class Test(Element): ... Scale = attributeproxy(u"Scale", enc = u"%.17g".__mod__, dec = float, default = 1.0, doc = "This is the scale (default = 1).") ... >>> x = Test() >>> # have not set value, default will be returned >>> x.Scale 1.0 >>> x.Scale = 16 >>> x.Scale 16.0 >>> # default can be retrieved via the .default attribute of the >>> # class attribute >>> Test.Scale.default 1.0 >>> # default is read-only >>> Test.Scale.default = 2. Traceback (most recent call last): File "", line 1, in AttributeError: can't set attribute >>> # internally, value is stored as unicode (for XML) >>> assert x.getAttribute("Scale") == "16" >>> # deleting an attribute restores the default value if defined >>> del x.Scale >>> x.Scale 1.0 Nc sfdd}fdd}fdd}|dkrRd}dk rR|dt7}tt||dk rj|nddk rx|nd|||_dk r|_dS) NcsDy|}Wn,tk r:dk r*StdYnX|S)Nzattribute '%s' is not set) getAttributeKeyErrorAttributeError)selfval)decdefaultnamerrgettersz'attributeproxy.__init__..gettercs||dS)N) setAttribute)rvalue)encrrrsettersz'attributeproxy.__init__..settercs|dS)N)removeAttribute)r)rrrdeletersz(attributeproxy.__init__..deleterzThe "%s" attribute.z Default is "%s" if not set.)strsuperr__init__r_default) rrr rrdocrr!r#) __class__)rrr rrr&s .zattributeproxy.__init__cCs|jS)zL Default value. AttributeError is raised if no default value is set. )r')rrrrrszattributeproxy.default) rrrrsix text_typer&propertyr __classcell__rr)r)rrVs?rc@seZdZdZdZeZeddZd,ddZ ddZ d d Z d d Z d dZ ddZddZddZddZddZddZddZddZdd Zd!d"Zd#d$Zd%d&Zd'd(Zejd)fd*d+ZdS)-Elementa Base class for all element types. This class is inspired by the class of the same name in the Python standard library's xml.dom package. One important distinction is that the standard DOM element is used to represent the structure of a document at a much finer level of detail than here. For example, in the case of the standard DOM element, each XML attribute is its own element being a child node of its tag, while here they are simply stored as attributes of the tag element itself. Despite the differences, the documentation for the xml.dom package, particularly that of the Element class and it's parent, the Node class, is useful as supplementary material in understanding how to use this class. NcstfddtDS)Nc3s"|]}tt|tr|VqdS)N) isinstancegetattrr).0r)clsrr sz*Element.validattributes..) frozensetdir)r2r)r2rvalidattributesszElement.validattributesc Csxd|_|dkrti|_nNt||kr6||_n2td|jdddt||Dfg|_ d|_ dS)z Construct an element. The argument is a sax.xmlreader.AttributesImpl object (see the xml.sax documentation, but it's basically a dictionary-like thing) used to set the element attributes. Nz#%s element: invalid attribute(s) %sz, css|]}d|VqdS)z'%s'Nr)r1keyrrrr3sz#Element.__init__..) parentNoder attributessetkeysr6r tagNamejoin childNodespcdata)rattrsrrrr&s 2zElement.__init__cCs&d||jddd|jDfS)z6 Generate the string for the element's start tag. z%s<%s%s>css|]}d|VqdS)z %s="%s"Nr)r1keyvaluerrrr3sz$Element.start_tag..)r<r=r9items)rindentrrr start_tagszElement.start_tagcCsd||jfS)z4 Generate the string for the element's end tag. z%s)r<)rrDrrrend_tagszElement.end_tagcCs*|j|||_|t|jd|S)zW Add a child to this element. The child's parentNode attribute is updated, too. r)r>appendr8_verifyChildrenlen)rchildrrr appendChilds zElement.appendChildcCsNx@t|jD]2\}}||kr |j||||_|||Sq Wt|dS)z Insert a new child node before an existing child. It must be the case that refchild is a child of this node; if not, ValueError is raised. newchild is returned. N) enumerater>insertr8rH ValueError)rnewchildZrefchildi childNoderrr insertBefores zElement.insertBeforecCs>x0t|jD]"\}}||kr |j|=d|_|Sq Wt|dS)z Remove a child from this element. The child element is returned, and it's parentNode element is reset. If the child will not be used any more, you should call its unlink() method to promote garbage collection. N)rLr>r8rN)rrJrPrQrrr removeChild s zElement.removeChildcCs.d|_x|jD] }|qW|jdd=dS)zp Break internal references within the document tree rooted on this element to promote garbage collection. N)r8r>unlink)rrJrrrrTs  zElement.unlinkcCsPxBt|jD]4\}}||kr d|_||j|<||_|||Sq Wt|dS)z Replace an existing node with a new node. 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N)rLr>r8rHrN)rrOZoldchildrPrQrrr replaceChild"s   zElement.replaceChildcs,tfdd|jg}|r(|||S)zj Return a list of elements below and including this element for which filter(element) returns True. cs||S)N) getElements)le)filterrr9z%Element.getElements..)r r>rG)rrYrWr)rYrrV4s zElement.getElementscs|fddS)Ncs |jkS)N)r<)rX)r<rrrZ?r[z.Element.getElementsByTagName..)rV)rr<r)r<rgetElementsByTagName>szElement.getElementsByTagNamec s^g}t|}xH|jD]>y$tfdd|Dr>|Wqtk rTYqXqW|S)Nc3s |]\}}||kVqdS)N)r)r1rr)crrr3Fsz2Element.getChildrenByAttributes..)tuplerCr>allrGr)rr@rWr)r]rgetChildrenByAttributesAs   zElement.getChildrenByAttributescCs ||jkS)N)r9)rattrnamerrr hasAttributeLszElement.hasAttributecCs |j|S)N)r9)rrarrrrOszElement.getAttributecCst||jj|<dS)N)r*r+r9_attrs)rrarrrrrRszElement.setAttributecCs(y|jj|=Wntk r"YnXdS)N)r9rcr)rrarrrr"YszElement.removeAttributecCs$|jdk r|j|7_n||_dS)z- Add characters to the element's pcdata. N)r?)rcontentrrr appendDatacs zElement.appendDatacCsdS)z Method used internally by some elements to verify that their children are from the allowed set and in the correct order following modifications to their child list. i is the index of the child that has just changed. Nr)rrPrrrrHlszElement._verifyChildrencCsdS)zV Method invoked by document parser when it encounters the end-of-element event. Nr)rrrr endElementuszElement.endElementrAcCs||||dx>|jD]4}|j|jkrFtd|j|jf|||tq"W|jdk r~|t|j|d|| ||ddS)z? Recursively write an element and it's children to a file.  zinvalid child %s for %sN) writerEr>r< validchildrenr Indentr? xmlescaperF)rfileobjrDr]rrrrh|s     z Element.write)N)rrrrr<r4ri classmethodr6r&rErFrKrRrSrTrUrVr\r`rbrrr"rerHrfsysstdoutrhrrrrr.s.         r.c@seZdZdZddZdS) EmptyElementz7 Parent class for Elements that cannot contain text. cCs|stdt|dS)Nz%s does not hold text)isspace TypeErrortype)rrdrrrreszEmptyElement.appendDataN)rrrrrerrrrrpsrpccs2x,|jD]"}|Vxt|D] }|VqWqWdS)zF Walk the XML tree of children below elem, returning each in order. N)r> WalkChildren)elemrJrrrrts rtc@s$eZdZdZddZeddZdS) LLWNameAttra? Baseclass to hide pattern-matching of various element names. Subclasses must provide a .dec_pattern compiled regular expression defining a group "Name" that identifies the meaningful portion of the string, and a .enc_pattern that gives a format string to be used with "%" to reconstrct the full string. This is intended to be used to provide the enc and dec functions for an attributeproxy instance. Example: >>> import re >>> class Test(Element): ... class TestName(LLWNameAttr): ... dec_pattern = re.compile(r"(?P[a-z0-9_]+):test\Z") ... enc_pattern = u"%s:test" ... ... Name = attributeproxy(u"Name", enc = TestName.enc, dec = TestName) ... >>> x = Test() >>> x.Name = u"blah" >>> # internally, suffix has been appended >>> print(x.getAttribute("Name")) blah:test >>> # but attributeproxy reports original value >>> print(x.Name) blah >>> # only lower-case Latin letters, numerals, and '_' are allowed >>> x.Name = u"Hello-world" Traceback (most recent call last): File "", line 1, in ValueError: invalid Name 'Hello-world' cCs0y|j|d}Wntk r*YnX|S)NName)Z dec_patternsearchgroupr)r2rrrr__new__s zLLWNameAttr.__new__cCs&|j|}|||kr"td||S)Nzinvalid Name '%s')Z enc_patternrN)r2rsrrrr s   zLLWNameAttr.encN)rrrrrzrmr rrrrrvs"rvc @sPeZdZdZdZeddddddddd d d g Zed Zed Z e dddZ dS)LIGO_LWz LIGO_LW element. CommentParamTableArrayStream IGWDFrameAdcData AdcIntervalTimeDetectorrwTypeNcs\||j}dk r&fdd|D}t|dkrTtd|jdk rJdndf|dS) z Scan xmldoc for a LIGO_LW element with .Name name. Raises ValueError if not exactly 1 such element is found. If name is None (default), then all LIGO_LW elements are considered to match (it is still an error if there is not exactly 1). Ncs$g|]}|dr|jkr|qS)rw)rbrw)r1ru)rrr sz'LIGO_LW.get_ligo_lw..rz.document must contain exactly one %s element%sz named %srAr)r\r<rIrN)r2ZxmldocrZelemsr)rr get_ligo_lws   "zLIGO_LW.get_ligo_lw)N) rrrrr<r4rirrwrrmrrrrrr|sr|c@s$eZdZdZdZejdfddZdS)r}z Comment element. rAcCsH||||jdk r*|t|j||d|ddS)NrArg)rhrEr?rkrF)rrlrDrrrrhs  z Comment.writeN)rrrrr<rnrorhrrrrr}sr}c@sNeZdZdZdZedgZedZedZ edZ edZ edZ edZ d S) r~z Param element. r}DataUnitrwScaleStartrUnitN)rrrrr<r4rirrrwrrrrrrrrr~ s r~c@s:eZdZdZdZedddgZedZedZ ddZ d S) rz Table element. r}ColumnrrwrcCsd}d}d}xv|jD]l}|jtjkrJ|r0td|s8|r@td|d7}q|jtjkrl|rbtd|d7}q|rxtd|d7}qWdS)Nrz!only one Comment allowed in Tablez6Comment must come before Column(s) and Stream in Tablerz*Column(s) must come before Stream in Tablez only one Stream allowed in Table)r>r<r}r r)rrPZncommentZncolumnnstreamrJrrrrH&s"     zTable._verifyChildrenN) rrrrr<r4rirrwrrHrrrrrs rc@sLeZdZdZdZedZedZedZddZ ddZ e j d fd d Z d S) rz Column element. rwrrcCs&d||jddd|jDfS)z6 Generate the string for the element's start tag. z %s<%s%s/>rAcss|]}d|VqdS)z %s="%s"Nr)r1rBrrrr3Isz#Column.start_tag..)r<r=r9rC)rrDrrrrEEszColumn.start_tagcCsdS)z4 Generate the string for the element's end tag. rAr)rrDrrrrFKszColumn.end_tagrAcCs||||ddS)z? Recursively write an element and it's children to a file. rgN)rhrE)rrlrDrrrrhQsz Column.writeN)rrrrr<rrwrrrErFrnrorhrrrrr;src@s@eZdZdZdZeddgZedZedZ edZ ddZ d S) rz Array element. DimrrwrrcCsFd}x<|jD]2}|jtjkr*|r>tdq |r6td|d7}q WdS)Nrz'Dim(s) must come before Stream in Arrayz only one Stream allowed in Arrayr)r>r<rr )rrPrrJrrrrHds   zArray._verifyChildrenN) rrrrr<r4rirrwrrrHrrrrrYs rc@seZdZdZdZedZedejdej ddZ edejdej ddZ edZ e dd Zejd d Zejd d Zejd fd dZdS)rz Dim element. rwrreal_8)r rrrcCs|jdk rtjd|jSdS)Nint_8s)r? ligolwtypesToPyType)rrrrn{szDim.ncCs |dk rtjd|nd|_dS)Nr)r FormatFuncr?)rrrrrrscCs d|_dS)N)r?)rrrrrsrAcCsH||||jdk r*|t|j||d|ddS)NrArg)rhrEr?rkrF)rrlrDrrrrhs  z Dim.writeN)rrrrr<rrwrrrrrrr,rr!r#rnrorhrrrrrps rcsTeZdZdZdZedZedddZedZedZ edd dZ fd d Z Z S) rz Stream element. Content Delimiter,)rEncodingrwrLocalcs,tt|j||jdkr(td|jdS)N)ZRemoterzinvalid Type for Stream: '%s')r%rr&rr )rargs)r)rrr&s zStream.__init__) rrrrr<rrrrrwrr&r-rr)r)rrs  rc @s6eZdZdZdZedddddddd dg Zed Zd S) rz IGWDFrame element. r}r~rrrr|rrrwN) rrrrr<r4rirrwrrrrrsrc@s*eZdZdZdZedddgZedZdS)rz Detector element. r}r~r|rwN) rrrrr<r4rirrwrrrrrsrc@s0eZdZdZdZeddddddgZedZdS) rz AdcData element. r}r~rr|rrwN) rrrrr<r4rirrwrrrrrsrc@sLeZdZdZdZedddgZedej dej ddZ edZ ed Z d S) rz AdcInterval element. rr}rDeltaTr)r rrw StartTimeN)rrrrr<r4rirrrrrrwrrrrrrs rcsleZdZdZdZedZedddZfddZdd Z e j d fd d Z e dddZe dddZZS)rz Time element. rwrzISO-8601)rcs.tt|j||jtjkr*td|jdS)Nzinvalid Type for Time: '%s')r%rr&rrZ TimeTypesr )rr)r)rrr&s z Time.__init__cCs`|jdkrtj|j|_n@|jdkrDddlm}|t|j|_n|jdkr\t|j|_ndS)NzISO-8601GPSr) LIGOTimeGPSUnix) rdateutilparserparser?Zlalrr$float)rrrrrrfs    zTime.endElementrAcCs||||jdk r|jdkr@|tt|jnX|jdkrb|tt|jn6|jdkr|td|jn|tt|j||d|ddS)NzISO-8601rrz%.16grArg) rhrEr?rrkr*r+ isoformatrF)rrlrDrrrrhs    z Time.writeNcCs$|}|dk r||_tj|_|S)z Instantiate a Time element initialized to the current UTC time in the default format (ISO-8601). 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Subsequent modification of the GPS time object will be reflected in what gets written to disk. rrN)rrwr?)r2Zgpsrwrrrrfrom_gps s z Time.from_gps)N)N)rrrrr<rrwrr&rfrnrorhrmrrr-rr)r)rrs   rc@s.eZdZdZdZedgZejdfddZ dS)Documentz" Description of a LIGO LW file. r|NcCsh|t|d|dk r*|d|x8|jD].}|j|jkrVtd|j|jf||q2WdS)z Write the document. rgNz. zinvalid child %s for %s)rhHeaderr>r<rir )rrlZxsl_filer]rrrrh"s    zDocument.write) rrrrr<r4rirnrorhrrrrrs rc@seZdZdZifddZddZddZdd Zd d Zd d Z ddZ ddZ ddZ ddZ ddZddZddZddZddZd d!Zd"d#Zd$S)%LIGOLWContentHandlera ContentHandler class for parsing LIGO Light Weight documents with a SAX2-compliant parser. Example: >>> # initialize empty Document tree into which parsed XML tree >>> # will be inserted >>> xmldoc = Document() >>> # create handler instance attached to Document object >>> handler = LIGOLWContentHandler(xmldoc) >>> # open file and parse >>> make_parser(handler).parse(open("demo.xml")) >>> # write XML (default to stdout) >>> xmldoc.write() NOTE: this example is for illustration only. Most users will wish to use the .load_*() functions in the ligo.lw.utils subpackage to load documents, and the .write_*() functions to write documents. Those functions provide additional features such as support for gzip'ed documents, MD5 hash computation, and Condor eviction trapping to avoid writing broken documents to disk. See also: PartialLIGOLWContentHandler, FilteringLIGOLWContentHandler. cCs||_|_dtjf|jdtjf|jdtjf|jdt jf|j dt jf|j dt jf|jdtjf|jdtjf|jdtjf|jdtjf|jdtjf|jdtjf|jdtjf|ji |_|j|dS)zo Initialize the handler by pointing it to the Document object into which the parsed file will be loaded. N)currentdocumentrr< startAdcDatarstartAdcIntervalr startArrayr startColumnr} startCommentr startDetectorrstartDimrstartIGWDFramer| startLIGO_LWr~ startParamr startStreamr startTabler startTime_startElementHandlersupdate)rrZstart_handlersrrrr&Us             zLIGOLWContentHandler.__init__cCst|S)N)r)rparentr@rrrrmsz!LIGOLWContentHandler.startAdcDatacCst|S)N)r)rrr@rrrrpsz%LIGOLWContentHandler.startAdcIntervalcCst|S)N)r)rrr@rrrrsszLIGOLWContentHandler.startArraycCst|S)N)r)rrr@rrrrvsz LIGOLWContentHandler.startColumncCst|S)N)r})rrr@rrrrysz!LIGOLWContentHandler.startCommentcCst|S)N)r)rrr@rrrr|sz"LIGOLWContentHandler.startDetectorcCst|S)N)r)rrr@rrrrszLIGOLWContentHandler.startDimcCst|S)N)r)rrr@rrrrsz#LIGOLWContentHandler.startIGWDFramecCst|S)N)r|)rrr@rrrrsz!LIGOLWContentHandler.startLIGO_LWcCst|S)N)r~)rrr@rrrrszLIGOLWContentHandler.startParamcCst|S)N)r)rrr@rrrrsz LIGOLWContentHandler.startStreamcCst|S)N)r)rrr@rrrrszLIGOLWContentHandler.startTablecCst|S)N)r)rrr@rrrrszLIGOLWContentHandler.startTimec s|\}}y|j||f}Wn(tk rBtd||p6tfYnXttfddDy|j||j|_Wn@t k r}z"t |d|j t |fWdd}~XYnXdS)Nz#unknown element %s for namespace %sc3s |]\}}||fVqdS)N)getQNameByName)r1rr)r@rrr3sz6LIGOLWContentHandler.startElementNS..z line %d: %s)rrr NameSpacerdictrCrrK Exceptionrs_locator getLineNumberr$)r uri_localnameqnamer@uri localnameZ start_handlerrXr)r@rstartElementNSsz#LIGOLWContentHandler.startElementNSc Csf|\}}y|jWn@tk rV}z"t|d|jt|fWdd}~XYnX|jj|_dS)Nz line %d: %s)rrfrrsrrr$r8)rrrrrrXrrr endElementNSs 0z!LIGOLWContentHandler.endElementNSc CsZy|jt|Wn@tk rT}z"t|d|jt|fWdd}~XYnXdS)Nz line %d: %s)rre xmlunescaperrsrrr$)rrdrXrrr charactersszLIGOLWContentHandler.charactersN)rrrrr&rrrrrrrrrrrrrrrrrrrrr9s$  rcsDeZdZdZfddZfddZfddZfdd ZZS) PartialLIGOLWContentHandlera6 LIGO LW content handler object that loads only those parts of the document matching some criteria. Useful, for example, when one wishes to read only a single table from a file. Example: >>> from ligo.lw import utils as ligolw_utils >>> def contenthandler(document): ... return PartialLIGOLWContentHandler(document, lambda name, attrs: name == Table.tagName) ... >>> xmldoc = ligolw_utils.load_filename("demo.xml", contenthandler = contenthandler) This parses "demo.xml" and returns an XML tree containing only the Table elements and their children. cs tt||||_d|_dS)z Only those elements for which element_filter(name, attrs) evaluates to True, and the children of those elements, will be loaded. rN)r%rr&element_filterdepth)rrr)r)rrr&sz$PartialLIGOLWContentHandler.__init__csf|\}}ttfddD}|jdks<|||rbtt|||f||jd7_dS)Nc3s |]\}}||fVqdS)N)r)r1rr)r@rrr3sz=PartialLIGOLWContentHandler.startElementNS..rr)rrrCrrr%rr)rrrr@rr filter_attrs)r))r@rrs z*PartialLIGOLWContentHandler.startElementNScs,|jdkr(|jd8_tt|j|dS)Nrr)rr%rr)rr)r)rrrs z(PartialLIGOLWContentHandler.endElementNScs|jdkrtt||dS)Nr)rr%rr)rrd)r)rrrs z&PartialLIGOLWContentHandler.characters) rrrrr&rrrr-rr)r)rrs   rcsDeZdZdZfddZfddZfddZfdd ZZS) FilteringLIGOLWContentHandleraI LIGO LW content handler that loads everything but those parts of a document that match some criteria. Useful, for example, when one wishes to read everything except a single table from a file. Example: >>> from ligo.lw import utils as ligolw_utils >>> def contenthandler(document): ... return FilteringLIGOLWContentHandler(document, lambda name, attrs: name != Table.tagName) ... >>> xmldoc = ligolw_utils.load_filename("demo.xml", contenthandler = contenthandler) This parses "demo.xml" and returns an XML tree with all the Table elements and their children removed. cs tt||||_d|_dS)z Those elements for which element_filter(name, attrs) evaluates to False, and the children of those elements, will not be loaded. rN)r%rr&rr)rrr)r)rrr&sz&FilteringLIGOLWContentHandler.__init__csh|\}}ttfddD}|jdkrV|||rVtt|||f|n|jd7_dS)Nc3s |]\}}||fVqdS)N)r)r1rr)r@rrr3sz?FilteringLIGOLWContentHandler.startElementNS..rr)rrrCrrr%rr)rrrr@rrr)r))r@rrs z,FilteringLIGOLWContentHandler.startElementNScs.|jdkrtt|j|n|jd8_dS)Nrr)rr%rr)rr)r)rrrs z*FilteringLIGOLWContentHandler.endElementNScs|jdkrtt||dS)Nr)rr%rr)rrd)r)rrrs z(FilteringLIGOLWContentHandler.characters) rrrrr&rrrr-rr)r)rrs   rcCsFt}|||tjjd|tjjd|tjjd|S)as Convenience function to construct a document parser with namespaces enabled and validation disabled. Document validation is a nice feature, but enabling validation can require the LIGO LW DTD to be downloaded from the LDAS document server if the DTD is not included inline in the XML. This requires a working connection to the internet and the server to be up. TF)r make_parserZsetContentHandlerZ setFeaturehandlerZfeature_namespacesZfeature_validationZfeature_external_ges)rrrrrrs  r)8rrZdateutil.parserrrnxmlrZxml.sax.xmlreaderrZxml.sax.saxutilsrrkrrrArrr r rr* functoolsr rrrjrr r,robjectr.rprtr+rvr|r}r~rrrrrrrrrrrrZContentHandlerrrrrrrrr!sN       gQ <    Pv,7