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    XML Parsing problem using DOM Parser: HELP NEEDED


    Hi,
    I have a problem and can't figure it out and need your help, please look at the following code and the output also a xml file snippet is down there too.
    Looking at the output I don't know why it's not according to the code.

    Following code is pretty much clear: When method starts execution <Pat> Node is passed it has childNodes
    Inside for-loop
    if x.localName == 'id': check for validTine and calls the same method again,
    now executes elif x.localName == 'validTime': check for the appropriate childNode and calls the method again,
    now inside if temp_node.localName == 'low': calls the method but instead of just executing elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    and printing only
    print " In low"
    it prints all the rest too i.e.
    print "In high"
    print "In high1"
    print "In high2"
    print "In high3"
    print "In high4"
    print "In high5"

    then again in the for-loop of validTime this time executes elif temp_node.localName == 'high': but instead of
    just executing elif x.localName == 'high' and x.parentNode.localName == 'validTime':
    and printing only
    print "In high"
    it prints all the rest too i.e.
    print "In low"
    print "In high1"
    print "In high2"
    print "In high3"
    print "In high4"
    print "In high5"

    and it continues for the rest.

    Why it when executing
    if temp_node.localName == 'low':
    print " **** low"
    self.iterate(x)
    only executes
    elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    print " In low"

    and so on. Why it iterates through all the rest elements too and when the condition for one is being checked.
    Is it the normal way that xml parsing is handled in python. If so what's the best way
    to handle this situation using DOM(Parser). As I need to parse the xml-file it's pretty big and each Node
    can have nested childNodes and so forth as the example shows. But anytime parsing the Node doesn't stops and jumps to the right condition
    as shown in the following sample: Any help is appreciated


    def iterate(self,node):
    print '0 === %s' % node.localName

    for x in node.childNodes:
    if x.nodeType == Node.TEXT_NODE:
    pass
    else:
    print "1 **** %s" % x.localName

    if x.localName == 'id':
    print " **** id"
    for temp_node in x.childNodes:
    if temp_node.localName == 'validTime':
    self.iterate(x)

    elif x.localName == 'validTime':
    for temp_node in x.childNodes:
    if temp_node.localName == 'low':
    print " **** low"
    self.iterate(x)
    elif temp_node.localName == 'high':
    print " **** low"
    self.iterate(x)
    elif temp_node.localName == 'high1':
    print " **** high1"
    self.iterate(x)
    elif temp_node.localName == 'high2':
    print " **** high2"
    self.iterate(x)
    elif temp_node.localName == 'high3':
    print " **** high3"
    self.iterate(x)
    elif temp_node.localName == 'high4':
    print " **** high4"
    self.iterate(x)
    elif temp_node.localName == 'high5':
    print " **** high5"
    self.iterate(x)
    else:
    pass

    elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    print " In low"
    elif x.localName == 'high' and x.parentNode.localName == 'validTime':
    print "In high"
    elif x.localName == 'high1' and x.parentNode.localName == 'validTime':
    print "In high1"
    elif x.localName == 'high2' and x.parentNode.localName == 'validTime':
    print "In high2"
    elif x.localName == 'high3' and x.parentNode.localName == 'validTime':
    print "In high3"
    elif x.localName == 'high4' and x.parentNode.localName == 'validTime':
    print "In high4"
    elif x.localName == 'high5' and x.parentNode.localName == 'validTime':
    print "In high5"


    *********** Following is the snippet of the .xml file ***************
    <Pat>
    <id>
    <validTime>
    <low val="l"/>
    <high val="12"/>
    <high1 val="123"/>
    <high2 val="1234"/>
    <high3 val="12345"/>
    <high4 val="123456"/>
    <high5 val="1234567"/>
    </validTime>
    </id>
    <Person/>
    <Organ>
    <id/>
    </Organ>
    </Pat>

    ************* Following is the output from execution of the method ************
    0 === Pat
    1 **** id
    0 === id
    1 **** validTime
    **** low
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high1
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high2
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high3
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high4
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high5
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    1 **** Person
    1 **** Organ
  2. #2
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    Originally Posted by rockets12345
    Hi,
    I have a problem and can't figure it out and need your help, please look at the following code and the output also a xml file snippet is down there too.
    Looking at the output I don't know why it's not according to the code.

    Following code is pretty much clear: When method starts execution <Pat> Node is passed it has childNodes
    Inside for-loop
    if x.localName == 'id': check for validTine and calls the same method again,
    now executes elif x.localName == 'validTime': check for the appropriate childNode and calls the method again,
    now inside if temp_node.localName == 'low': calls the method but instead of just executing elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    and printing only
    print " In low"
    it prints all the rest too i.e.
    print "In high"
    print "In high1"
    print "In high2"
    print "In high3"
    print "In high4"
    print "In high5"

    then again in the for-loop of validTime this time executes elif temp_node.localName == 'high': but instead of
    just executing elif x.localName == 'high' and x.parentNode.localName == 'validTime':
    and printing only
    print "In high"
    it prints all the rest too i.e.
    print "In low"
    print "In high1"
    print "In high2"
    print "In high3"
    print "In high4"
    print "In high5"

    and it continues for the rest.

    Why it when executing
    if temp_node.localName == 'low':
    print " **** low"
    self.iterate(x)
    only executes
    elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    print " In low"

    and so on. Why it iterates through all the rest elements too and when the condition for one is being checked.
    Is it the normal way that xml parsing is handled in python. If so what's the best way
    to handle this situation using DOM(Parser). As I need to parse the xml-file it's pretty big and each Node
    can have nested childNodes and so forth as the example shows. But anytime parsing the Node doesn't stops and jumps to the right condition
    as shown in the following sample: Any help is appreciated


    def iterate(self,node):
    print '0 === %s' % node.localName

    for x in node.childNodes:
    if x.nodeType == Node.TEXT_NODE:
    pass
    else:
    print "1 **** %s" % x.localName

    if x.localName == 'id':
    print " **** id"
    for temp_node in x.childNodes:
    if temp_node.localName == 'validTime':
    self.iterate(x)

    elif x.localName == 'validTime':
    for temp_node in x.childNodes:
    if temp_node.localName == 'low':
    print " **** low"
    self.iterate(x)
    elif temp_node.localName == 'high':
    print " **** low"
    self.iterate(x)
    elif temp_node.localName == 'high1':
    print " **** high1"
    self.iterate(x)
    elif temp_node.localName == 'high2':
    print " **** high2"
    self.iterate(x)
    elif temp_node.localName == 'high3':
    print " **** high3"
    self.iterate(x)
    elif temp_node.localName == 'high4':
    print " **** high4"
    self.iterate(x)
    elif temp_node.localName == 'high5':
    print " **** high5"
    self.iterate(x)
    else:
    pass

    elif x.localName == 'low' and x.parentNode.localName == 'validTime':
    print " In low"
    elif x.localName == 'high' and x.parentNode.localName == 'validTime':
    print "In high"
    elif x.localName == 'high1' and x.parentNode.localName == 'validTime':
    print "In high1"
    elif x.localName == 'high2' and x.parentNode.localName == 'validTime':
    print "In high2"
    elif x.localName == 'high3' and x.parentNode.localName == 'validTime':
    print "In high3"
    elif x.localName == 'high4' and x.parentNode.localName == 'validTime':
    print "In high4"
    elif x.localName == 'high5' and x.parentNode.localName == 'validTime':
    print "In high5"


    *********** Following is the snippet of the .xml file ***************
    <Pat>
    <id>
    <validTime>
    <low val="l"/>
    <high val="12"/>
    <high1 val="123"/>
    <high2 val="1234"/>
    <high3 val="12345"/>
    <high4 val="123456"/>
    <high5 val="1234567"/>
    </validTime>
    </id>
    <Person/>
    <Organ>
    <id/>
    </Organ>
    </Pat>

    ************* Following is the output from execution of the method ************
    0 === Pat
    1 **** id
    0 === id
    1 **** validTime
    **** low
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high1
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high2
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high3
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high4
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    **** high5
    0 === validTime
    1 **** low
    In low
    1 **** high
    In high
    1 **** high1
    In high1
    1 **** high2
    In high2
    1 **** high3
    In high3
    1 **** high4
    In high4
    1 **** high5
    In high5
    1 **** Person
    1 **** Organ
    Any ideas
  4. #3
  5. Mini me.
    Devshed Novice (500 - 999 posts)

    Join Date
    Nov 2003
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    Cambridge, UK
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    Please use a code block then someone may be able to help.

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