Searching XML tables using LXML & XPath











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Trying to find a better way to navigate an XML file in Python. Currently have something looking like this.



import xml.etree.ElementTree as ET
tree = ET.parse('file.xml')
root = tree.getroot()
TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}'
for child in root:
DID = child.find('PollingDistrictIdentifier')
for grandchild in child.getchildren():
Name = grandchild.find('TagSlug+Name')
for grandgrandchild in grandchild.getchildren():
for grandgrandgrandchild in grandgrandchild.getchildren():
PP = grandgrandchild.find(TagSlug+'PollingPlaceIdentifier')
print(PP.attrib['Id'], PP.attrib['Name'], DID.attrib['Id'], Name.text)


The XML is structured similar to below.



<PollingDistrictList Created="2018-10-30T12:01:21.043" xmlns="http://www.aec.gov.au/xml/schema/mediafeed" xmlns:eml="urn:oasis:names:tc:evs:schema:eml" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xal="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0" xmlns:xnl="urn:oasis:names:tc:ciq:xsdschema:xNL:2.0" xmlns:ts="urn:oasis:names:tc:evs:schema:eml:ts" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
<TransactionId>4C59F7F3-2405-4443-8A1F-3F2BEF6E07C4</TransactionId>
<eml:EventIdentifier Id="12122">
<eml:EventName>State Election 2018</eml:EventName>
</eml:EventIdentifier>
<PollingDistrict>
<PollingDistrictIdentifier Id="10153">
<Name>Albert Park District</Name>
</PollingDistrictIdentifier>
<PollingPlaces>
<PollingPlace>
<PollingPlaceIdentifier Id="13133" Name="Bridport" />
<WheelchairAccess>None</WheelchairAccess>
</PollingPlace>
<PollingPlace>
<PollingPlaceIdentifier Id="13987" Name="Kerferd South" />
<WheelchairAccess>None</WheelchairAccess>
</PollingPlace>
<PollingPlaceIdentifier Id="13504" Name="Middle Park" />
<WheelchairAccess>None</WheelchairAccess>
</PollingPlace>
</PollingDistrict>
<PollingDistrict>
<PollingDistrictIdentifier = ....
et cetera


I am trying to print a list of polling place IDs, polling place names, district IDs, and district names but am struggling with the final part. I have tried several different things, this is some of the methods:



a = tree.findall('./PollingDistrictList/PollingDistrict/PollingPlaces/PollingPlace')
print(a.text)


a = tree.findall('.//PollingPlace')
print(a.text)


I end up getting errors that 'Nonetype' or 'list' has has no attribute 'text' and if I removed the '.text', I get nothing. I am looking to find a better way to navigate the XML file instead of doing this recursive 'child in root' stuff.



Ideally, I'd be getting:



[PP1Id], [PP1Name], [District1Id], [District1Name]
[PP2Id], [PP2Name], [District1Id], [District1Name]
...
[PP1Id], [PP1Name], [District2Id], [District2Name]
etc


Any advice would be appreciated.










share|improve this question


























    up vote
    0
    down vote

    favorite












    Trying to find a better way to navigate an XML file in Python. Currently have something looking like this.



    import xml.etree.ElementTree as ET
    tree = ET.parse('file.xml')
    root = tree.getroot()
    TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}'
    for child in root:
    DID = child.find('PollingDistrictIdentifier')
    for grandchild in child.getchildren():
    Name = grandchild.find('TagSlug+Name')
    for grandgrandchild in grandchild.getchildren():
    for grandgrandgrandchild in grandgrandchild.getchildren():
    PP = grandgrandchild.find(TagSlug+'PollingPlaceIdentifier')
    print(PP.attrib['Id'], PP.attrib['Name'], DID.attrib['Id'], Name.text)


    The XML is structured similar to below.



    <PollingDistrictList Created="2018-10-30T12:01:21.043" xmlns="http://www.aec.gov.au/xml/schema/mediafeed" xmlns:eml="urn:oasis:names:tc:evs:schema:eml" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xal="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0" xmlns:xnl="urn:oasis:names:tc:ciq:xsdschema:xNL:2.0" xmlns:ts="urn:oasis:names:tc:evs:schema:eml:ts" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
    <TransactionId>4C59F7F3-2405-4443-8A1F-3F2BEF6E07C4</TransactionId>
    <eml:EventIdentifier Id="12122">
    <eml:EventName>State Election 2018</eml:EventName>
    </eml:EventIdentifier>
    <PollingDistrict>
    <PollingDistrictIdentifier Id="10153">
    <Name>Albert Park District</Name>
    </PollingDistrictIdentifier>
    <PollingPlaces>
    <PollingPlace>
    <PollingPlaceIdentifier Id="13133" Name="Bridport" />
    <WheelchairAccess>None</WheelchairAccess>
    </PollingPlace>
    <PollingPlace>
    <PollingPlaceIdentifier Id="13987" Name="Kerferd South" />
    <WheelchairAccess>None</WheelchairAccess>
    </PollingPlace>
    <PollingPlaceIdentifier Id="13504" Name="Middle Park" />
    <WheelchairAccess>None</WheelchairAccess>
    </PollingPlace>
    </PollingDistrict>
    <PollingDistrict>
    <PollingDistrictIdentifier = ....
    et cetera


    I am trying to print a list of polling place IDs, polling place names, district IDs, and district names but am struggling with the final part. I have tried several different things, this is some of the methods:



    a = tree.findall('./PollingDistrictList/PollingDistrict/PollingPlaces/PollingPlace')
    print(a.text)


    a = tree.findall('.//PollingPlace')
    print(a.text)


    I end up getting errors that 'Nonetype' or 'list' has has no attribute 'text' and if I removed the '.text', I get nothing. I am looking to find a better way to navigate the XML file instead of doing this recursive 'child in root' stuff.



    Ideally, I'd be getting:



    [PP1Id], [PP1Name], [District1Id], [District1Name]
    [PP2Id], [PP2Name], [District1Id], [District1Name]
    ...
    [PP1Id], [PP1Name], [District2Id], [District2Name]
    etc


    Any advice would be appreciated.










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Trying to find a better way to navigate an XML file in Python. Currently have something looking like this.



      import xml.etree.ElementTree as ET
      tree = ET.parse('file.xml')
      root = tree.getroot()
      TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}'
      for child in root:
      DID = child.find('PollingDistrictIdentifier')
      for grandchild in child.getchildren():
      Name = grandchild.find('TagSlug+Name')
      for grandgrandchild in grandchild.getchildren():
      for grandgrandgrandchild in grandgrandchild.getchildren():
      PP = grandgrandchild.find(TagSlug+'PollingPlaceIdentifier')
      print(PP.attrib['Id'], PP.attrib['Name'], DID.attrib['Id'], Name.text)


      The XML is structured similar to below.



      <PollingDistrictList Created="2018-10-30T12:01:21.043" xmlns="http://www.aec.gov.au/xml/schema/mediafeed" xmlns:eml="urn:oasis:names:tc:evs:schema:eml" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xal="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0" xmlns:xnl="urn:oasis:names:tc:ciq:xsdschema:xNL:2.0" xmlns:ts="urn:oasis:names:tc:evs:schema:eml:ts" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
      <TransactionId>4C59F7F3-2405-4443-8A1F-3F2BEF6E07C4</TransactionId>
      <eml:EventIdentifier Id="12122">
      <eml:EventName>State Election 2018</eml:EventName>
      </eml:EventIdentifier>
      <PollingDistrict>
      <PollingDistrictIdentifier Id="10153">
      <Name>Albert Park District</Name>
      </PollingDistrictIdentifier>
      <PollingPlaces>
      <PollingPlace>
      <PollingPlaceIdentifier Id="13133" Name="Bridport" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      <PollingPlace>
      <PollingPlaceIdentifier Id="13987" Name="Kerferd South" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      <PollingPlaceIdentifier Id="13504" Name="Middle Park" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      </PollingDistrict>
      <PollingDistrict>
      <PollingDistrictIdentifier = ....
      et cetera


      I am trying to print a list of polling place IDs, polling place names, district IDs, and district names but am struggling with the final part. I have tried several different things, this is some of the methods:



      a = tree.findall('./PollingDistrictList/PollingDistrict/PollingPlaces/PollingPlace')
      print(a.text)


      a = tree.findall('.//PollingPlace')
      print(a.text)


      I end up getting errors that 'Nonetype' or 'list' has has no attribute 'text' and if I removed the '.text', I get nothing. I am looking to find a better way to navigate the XML file instead of doing this recursive 'child in root' stuff.



      Ideally, I'd be getting:



      [PP1Id], [PP1Name], [District1Id], [District1Name]
      [PP2Id], [PP2Name], [District1Id], [District1Name]
      ...
      [PP1Id], [PP1Name], [District2Id], [District2Name]
      etc


      Any advice would be appreciated.










      share|improve this question













      Trying to find a better way to navigate an XML file in Python. Currently have something looking like this.



      import xml.etree.ElementTree as ET
      tree = ET.parse('file.xml')
      root = tree.getroot()
      TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}'
      for child in root:
      DID = child.find('PollingDistrictIdentifier')
      for grandchild in child.getchildren():
      Name = grandchild.find('TagSlug+Name')
      for grandgrandchild in grandchild.getchildren():
      for grandgrandgrandchild in grandgrandchild.getchildren():
      PP = grandgrandchild.find(TagSlug+'PollingPlaceIdentifier')
      print(PP.attrib['Id'], PP.attrib['Name'], DID.attrib['Id'], Name.text)


      The XML is structured similar to below.



      <PollingDistrictList Created="2018-10-30T12:01:21.043" xmlns="http://www.aec.gov.au/xml/schema/mediafeed" xmlns:eml="urn:oasis:names:tc:evs:schema:eml" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xal="urn:oasis:names:tc:ciq:xsdschema:xAL:2.0" xmlns:xnl="urn:oasis:names:tc:ciq:xsdschema:xNL:2.0" xmlns:ts="urn:oasis:names:tc:evs:schema:eml:ts" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
      <TransactionId>4C59F7F3-2405-4443-8A1F-3F2BEF6E07C4</TransactionId>
      <eml:EventIdentifier Id="12122">
      <eml:EventName>State Election 2018</eml:EventName>
      </eml:EventIdentifier>
      <PollingDistrict>
      <PollingDistrictIdentifier Id="10153">
      <Name>Albert Park District</Name>
      </PollingDistrictIdentifier>
      <PollingPlaces>
      <PollingPlace>
      <PollingPlaceIdentifier Id="13133" Name="Bridport" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      <PollingPlace>
      <PollingPlaceIdentifier Id="13987" Name="Kerferd South" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      <PollingPlaceIdentifier Id="13504" Name="Middle Park" />
      <WheelchairAccess>None</WheelchairAccess>
      </PollingPlace>
      </PollingDistrict>
      <PollingDistrict>
      <PollingDistrictIdentifier = ....
      et cetera


      I am trying to print a list of polling place IDs, polling place names, district IDs, and district names but am struggling with the final part. I have tried several different things, this is some of the methods:



      a = tree.findall('./PollingDistrictList/PollingDistrict/PollingPlaces/PollingPlace')
      print(a.text)


      a = tree.findall('.//PollingPlace')
      print(a.text)


      I end up getting errors that 'Nonetype' or 'list' has has no attribute 'text' and if I removed the '.text', I get nothing. I am looking to find a better way to navigate the XML file instead of doing this recursive 'child in root' stuff.



      Ideally, I'd be getting:



      [PP1Id], [PP1Name], [District1Id], [District1Name]
      [PP2Id], [PP2Name], [District1Id], [District1Name]
      ...
      [PP1Id], [PP1Name], [District2Id], [District2Name]
      etc


      Any advice would be appreciated.







      python xml xpath






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 9 at 13:06









      notanothercliche

      83




      83
























          1 Answer
          1






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          oldest

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          up vote
          0
          down vote



          accepted










          Fixed this with the following. Annotated so you can see what it's doing.



              import os ###Required to change directory
          os.chdir('C:/XMLDataLocation') ###Set directory
          import lxml
          from lxml import etree
          import xml.etree.ElementTree as ET ###Will parse xml
          import requests ###Requests will be used for the VEC site, not utilised at this stage
          tree = ET.parse('State2018MediaFilePollingLocations.xml') ###Loads file
          root = tree.getroot()


          TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}' #This is pre-appended all nodes so saves space

          PollingDistricts = root.findall(TagSlug+'PollingDistrict') #Goes from level 0 (root) to level 1 (PollingDistrict)
          for PollingDistrict in PollingDistricts: #Required otherwise only the first district would display
          DistrictID = PollingDistrict.find(TagSlug+'PollingDistrictIdentifier') #Finds the district ID
          Name = DistrictID.find(TagSlug+'Name') #Finds the name of each electorate (as a child of DistrictID)
          PollingPlaces = PollingDistrict.find(TagSlug+'PollingPlaces')
          PollingPlace = PollingPlaces.find(TagSlug+'PollingPlace') #These two lines are ONLY for navigating the XML file
          for PollingPlace in PollingPlaces: #Required otherwise it would only print the first booth in each electorate
          PPID = PollingPlace.find(TagSlug+'PollingPlaceIdentifier') #Finds both the booth ID and name
          print(PPID.attrib['Id'], PPID.attrib['Name'], DistrictID.attrib['Id'], Name.text) #Prints the text





          share|improve this answer





















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            1 Answer
            1






            active

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            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote



            accepted










            Fixed this with the following. Annotated so you can see what it's doing.



                import os ###Required to change directory
            os.chdir('C:/XMLDataLocation') ###Set directory
            import lxml
            from lxml import etree
            import xml.etree.ElementTree as ET ###Will parse xml
            import requests ###Requests will be used for the VEC site, not utilised at this stage
            tree = ET.parse('State2018MediaFilePollingLocations.xml') ###Loads file
            root = tree.getroot()


            TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}' #This is pre-appended all nodes so saves space

            PollingDistricts = root.findall(TagSlug+'PollingDistrict') #Goes from level 0 (root) to level 1 (PollingDistrict)
            for PollingDistrict in PollingDistricts: #Required otherwise only the first district would display
            DistrictID = PollingDistrict.find(TagSlug+'PollingDistrictIdentifier') #Finds the district ID
            Name = DistrictID.find(TagSlug+'Name') #Finds the name of each electorate (as a child of DistrictID)
            PollingPlaces = PollingDistrict.find(TagSlug+'PollingPlaces')
            PollingPlace = PollingPlaces.find(TagSlug+'PollingPlace') #These two lines are ONLY for navigating the XML file
            for PollingPlace in PollingPlaces: #Required otherwise it would only print the first booth in each electorate
            PPID = PollingPlace.find(TagSlug+'PollingPlaceIdentifier') #Finds both the booth ID and name
            print(PPID.attrib['Id'], PPID.attrib['Name'], DistrictID.attrib['Id'], Name.text) #Prints the text





            share|improve this answer

























              up vote
              0
              down vote



              accepted










              Fixed this with the following. Annotated so you can see what it's doing.



                  import os ###Required to change directory
              os.chdir('C:/XMLDataLocation') ###Set directory
              import lxml
              from lxml import etree
              import xml.etree.ElementTree as ET ###Will parse xml
              import requests ###Requests will be used for the VEC site, not utilised at this stage
              tree = ET.parse('State2018MediaFilePollingLocations.xml') ###Loads file
              root = tree.getroot()


              TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}' #This is pre-appended all nodes so saves space

              PollingDistricts = root.findall(TagSlug+'PollingDistrict') #Goes from level 0 (root) to level 1 (PollingDistrict)
              for PollingDistrict in PollingDistricts: #Required otherwise only the first district would display
              DistrictID = PollingDistrict.find(TagSlug+'PollingDistrictIdentifier') #Finds the district ID
              Name = DistrictID.find(TagSlug+'Name') #Finds the name of each electorate (as a child of DistrictID)
              PollingPlaces = PollingDistrict.find(TagSlug+'PollingPlaces')
              PollingPlace = PollingPlaces.find(TagSlug+'PollingPlace') #These two lines are ONLY for navigating the XML file
              for PollingPlace in PollingPlaces: #Required otherwise it would only print the first booth in each electorate
              PPID = PollingPlace.find(TagSlug+'PollingPlaceIdentifier') #Finds both the booth ID and name
              print(PPID.attrib['Id'], PPID.attrib['Name'], DistrictID.attrib['Id'], Name.text) #Prints the text





              share|improve this answer























                up vote
                0
                down vote



                accepted







                up vote
                0
                down vote



                accepted






                Fixed this with the following. Annotated so you can see what it's doing.



                    import os ###Required to change directory
                os.chdir('C:/XMLDataLocation') ###Set directory
                import lxml
                from lxml import etree
                import xml.etree.ElementTree as ET ###Will parse xml
                import requests ###Requests will be used for the VEC site, not utilised at this stage
                tree = ET.parse('State2018MediaFilePollingLocations.xml') ###Loads file
                root = tree.getroot()


                TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}' #This is pre-appended all nodes so saves space

                PollingDistricts = root.findall(TagSlug+'PollingDistrict') #Goes from level 0 (root) to level 1 (PollingDistrict)
                for PollingDistrict in PollingDistricts: #Required otherwise only the first district would display
                DistrictID = PollingDistrict.find(TagSlug+'PollingDistrictIdentifier') #Finds the district ID
                Name = DistrictID.find(TagSlug+'Name') #Finds the name of each electorate (as a child of DistrictID)
                PollingPlaces = PollingDistrict.find(TagSlug+'PollingPlaces')
                PollingPlace = PollingPlaces.find(TagSlug+'PollingPlace') #These two lines are ONLY for navigating the XML file
                for PollingPlace in PollingPlaces: #Required otherwise it would only print the first booth in each electorate
                PPID = PollingPlace.find(TagSlug+'PollingPlaceIdentifier') #Finds both the booth ID and name
                print(PPID.attrib['Id'], PPID.attrib['Name'], DistrictID.attrib['Id'], Name.text) #Prints the text





                share|improve this answer












                Fixed this with the following. Annotated so you can see what it's doing.



                    import os ###Required to change directory
                os.chdir('C:/XMLDataLocation') ###Set directory
                import lxml
                from lxml import etree
                import xml.etree.ElementTree as ET ###Will parse xml
                import requests ###Requests will be used for the VEC site, not utilised at this stage
                tree = ET.parse('State2018MediaFilePollingLocations.xml') ###Loads file
                root = tree.getroot()


                TagSlug = '{http://www.aec.gov.au/xml/schema/mediafeed}' #This is pre-appended all nodes so saves space

                PollingDistricts = root.findall(TagSlug+'PollingDistrict') #Goes from level 0 (root) to level 1 (PollingDistrict)
                for PollingDistrict in PollingDistricts: #Required otherwise only the first district would display
                DistrictID = PollingDistrict.find(TagSlug+'PollingDistrictIdentifier') #Finds the district ID
                Name = DistrictID.find(TagSlug+'Name') #Finds the name of each electorate (as a child of DistrictID)
                PollingPlaces = PollingDistrict.find(TagSlug+'PollingPlaces')
                PollingPlace = PollingPlaces.find(TagSlug+'PollingPlace') #These two lines are ONLY for navigating the XML file
                for PollingPlace in PollingPlaces: #Required otherwise it would only print the first booth in each electorate
                PPID = PollingPlace.find(TagSlug+'PollingPlaceIdentifier') #Finds both the booth ID and name
                print(PPID.attrib['Id'], PPID.attrib['Name'], DistrictID.attrib['Id'], Name.text) #Prints the text






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 10 at 6:41









                notanothercliche

                83




                83






























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