解析 .xml 文件中的数据并将其保存到 Python 中的 .tsv 文件

Question

I have a dataset which looks like this:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Reviews>
<Review rid="1004293">
    <sentences>
        <sentence id="1004293:0">
            <text>Judging from previous posts this used to be a good place, but not any longer.</text>
            <Opinions>
                <Opinion target="place" category="RESTAURANT#GENERAL" polarity="negative" from="51" to="56"/>
            </Opinions>
        </sentence>
        <sentence id="1004293:1">
            <text>The food here is rather good, but only if you like to wait for it.</text>
            <Opinions>
                <Opinion target="food" category="FOOD#QUALITY" polarity="positive" from="4" to="8"/>
                <Opinion target="NULL" category="SERVICE#GENERAL" polarity="negative" from="0" to="0"/>
            </Opinions>
        </sentence>
...

How can I parse the data from this .xml file to .tsv file in the following format:

["negative", "Judging from previous posts this used to be a good place, but not any longer.", "RESTAURANT#GENERAL"]

["positive", "The food here is rather good, but only if you like to wait for it.","FOOD#QUALITY"]

["negative", "The food here is rather good, but only if you like to wait for it.","SERVICE#GENERAL"]

Thanks!

Answer 1

You can use elementtree package of python to get your desired output. Below is the code which will print your list. You can create a tsv by replacing the print and writing to a tsv file.

The sample.xml file must be present in the same directory where this code is present.

from xml.etree import ElementTree

file = 'sample.xml'

tree = ElementTree.parse(file)
root = tree.getroot()

for sentence in root.iter('sentence'):
# Loop all sentence in the xml
    for opinion in sentence.iter('Opinion'):
    # Loop all Opinion of a particular sentence.
        print([opinion.attrib['polarity'], sentence.find('text').text, opinion.attrib['category']])

Output:

['negative', 'Judging from previous posts this used to be a good place, but not any longer.', 'RESTAURANT#GENERAL']                                                     
['positive', 'The food here is rather good, but only if you like to wait for it.', 'FOOD#QUALITY']                                                                      
['negative', 'The food here is rather good, but only if you like to wait for it.', 'SERVICE#GENERAL'] 

sample.xml contains:

<Reviews>
<Review rid="1004293">
    <sentences>
        <sentence id="1004293:0">
            <text>Judging from previous posts this used to be a good place, but not any longer.</text>
            <Opinions>
                <Opinion target="place" category="RESTAURANT#GENERAL" polarity="negative" from="51" to="56"/>
            </Opinions>
        </sentence>
        <sentence id="1004293:1">
            <text>The food here is rather good, but only if you like to wait for it.</text>
            <Opinions>
                <Opinion target="food" category="FOOD#QUALITY" polarity="positive" from="4" to="8"/>
                <Opinion target="NULL" category="SERVICE#GENERAL" polarity="negative" from="0" to="0"/>
            </Opinions>
        </sentence>
    </sentences>
</Review>