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Help with a Python script converting xml to csv

Avatar of Scott Abraham
Scott AbrahamFlag for United States of America asked on
XMLPython
3 Comments1 Solution743 ViewsLast Modified:
I have an xml file that I want to extract data from and put it into a CSV file.  I have most the script working fine.  My problem is each row or data point needs a time stamp.  In the xml the times are given as a start and stop time with the number of time intervals/data points given instead of time.

For Instance:
<ContiguousIntervalSet NumberOfReadings="24">
          <TimePeriod StartTime="2017-03-21T00:00:00-05:00" EndTime="2017-03-22T00:00:00-05:00" />
This tells me that their are 24 reads over 24 hours, each one being at the top of the hour.
Here is what the reads look like:
 <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
This tells me the 24 data points for the time frame, but no date/time.

This tells me what item and point I am looking for:
<ChannelID ServicePointChannelID="73825602:101" />
Ideally in the output file in this instance it would be like this:
Value,EntityId,ReadingTime,ServicePointChannelID
1,73825602,2017-03-21T00:00:00-05:00,101
1,73825602,2017-03-21T01:00:00-05:00,101
1,73825602,2017-03-21T02:00:00-05:00,101
1,73825602,2017-03-21T03:00:00-05:00,101
1,73825602,2017-03-21T04:00:00-05:00,101
1,73825602,2017-03-21T05:00:00-05:00,101
1,73825602,2017-03-21T06:00:00-05:00,101
1,73825602,2017-03-21T07:00:00-05:00,101
1,73825602,2017-03-21T08:00:00-05:00,101
1,73825602,2017-03-21T09:00:00-05:00,101
1,73825602,2017-03-21T10:00:00-05:00,101
1,73825602,2017-03-21T11:00:00-05:00,101
1,73825602,2017-03-21T12:00:00-05:00,101
1,73825602,2017-03-21T13:00:00-05:00,101
1,73825602,2017-03-21T14:00:00-05:00,101
1,73825602,2017-03-21T15:00:00-05:00,101
1,73825602,2017-03-21T16:00:00-05:00,101
1,73825602,2017-03-21T17:00:00-05:00,101
1,73825602,2017-03-21T18:00:00-05:00,101
1,73825602,2017-03-21T19:00:00-05:00,101
1,73825602,2017-03-21T20:00:00-05:00,101
1,73825602,2017-03-21T21:00:00-05:00,101
1,73825602,2017-03-21T22:00:00-05:00,101
1,73825602,2017-03-21T23:00:00-05:00,101
I can get it to output:
Value,EntityId,ServicePointChannelID
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
1.0,73825602,101
Here is a sample of the XML file with two time periods:
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<MeterReadingDocument xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <ReadingStatusRefTable>
    <ReadingStatusRef Ref="1">
      <UnencodedStatus SourceValidation="NV">
        <StatusCodes>
          <Code>ESTIMATED</Code>
          <Code>ESTNUMREPLACE</Code>
          <Code>ESTUNSCALED</Code>
          <Code>GAP</Code>
          <Code>NV</Code>
          <Code>VEESET1PV</Code>
          <Code>VEESET2NV</Code>
          <Code>VEESET3NV</Code>
        </StatusCodes>
      </UnencodedStatus>
    </ReadingStatusRef>
	<!--DELETED LARGE AMOUNT OF ReadingStatusRef inumerations -->
  </ReadingStatusRefTable>
  <Header>
    <IEE_System Id="REDACTED" />
    <Creation_Datetime Datetime="2017-03-22T09:09:21Z" />
    <Timezone Id="UTC" />
    <Path FilePath="REDACTED" />
    <Export_Template Id="REDACTED" />
    <CorrelationID Id="" />
  </Header>
  <ImportExportParameters CreateResubmitFile="false" CreateReadingGroupForRegisterReads="true">
    <DataFormat ReadingTimestampType="MeterDefault" DSTTransitionType="REDACTED" />
  </ImportExportParameters>
  <Channels>
    <Channel StartDate="2017-03-21T00:00:00-05:00" EndDate="2017-03-22T00:00:00-05:00" TimeZone="CentralUS" IsRegister="false" MarketType="Electric" IntervalLength="60" NumberOfDials="-1" PulseMultiplier="1" PressureCompensationFactor="1" IsReadingDecoded="true" ReadingsInPulse="false">
      <ChannelID ServicePointChannelID="73825602:101" />
      <ContiguousIntervalSets>
        <ContiguousIntervalSet NumberOfReadings="24">
          <TimePeriod StartTime="2017-03-21T00:00:00-05:00" EndTime="2017-03-22T00:00:00-05:00" />
          <Readings>
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
            <Reading Value="1.0" StatusRef="1" />
          </Readings>
          <ExportRequest RequestID="702" EntityType="ServicePoint" EntityID="73825602" RequestSource="Scheduled" />
        </ContiguousIntervalSet>
      </ContiguousIntervalSets>
    </Channel>
	<Channel StartDate="2017-03-21T00:00:00-05:00" EndDate="2017-03-22T00:00:00-05:00" TimeZone="CentralUS" IsRegister="false" MarketType="Electric" IntervalLength="5" NumberOfDials="-1" PulseMultiplier="0.025" PressureCompensationFactor="1" IsReadingDecoded="true" ReadingsInPulse="false">
      <ChannelID ServicePointChannelID="76058806:404" />
      <ContiguousIntervalSets>
        <ContiguousIntervalSet NumberOfReadings="288">
          <TimePeriod StartTime="2017-03-21T00:00:00-05:00" EndTime="2017-03-22T00:00:00-05:00" />
          <Readings>
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
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            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
            <Reading Value="0.0" StatusRef="3" />
          </Readings>
          <ExportRequest RequestID="702" EntityType="ServicePoint" EntityID="76058806" RequestSource="Scheduled" />
        </ContiguousIntervalSet>
      </ContiguousIntervalSets>
    </Channel>
</Channels>
</MeterReadingDocument>
Here is my py code:
import xml.etree.ElementTree as ET
import csv

tree = ET.parse('dataexport.xml')
root = tree.getroot()[3]

with open('dataexport.csv', 'wb') as fout:
    writer = csv.writer(fout)
    row = ['Value', 'EntityId', 'ServicePointChannelID']
    writer.writerow(row)
    for channel in tree.iter('Channel'):
        for exportrequest in channel.iter('ExportRequest'):
            entityid = exportrequest.attrib.get('EntityID')
        for channelid in channel.iter ('ChannelID'):
            servicepointchannelid = channelid.attrib.get ('ServicePointChannelID')
            for meterread in channel.iter('Reading'):
                read = meterread.attrib.get('Value')
                row = [read, entityid, servicepointchannelid[9:]]
                print ', '.join(row)
                writer.writerow(row)
I am vexed.  Any help would be appreciated!
ASKER CERTIFIED SOLUTION
pepr

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