Read XML line by line without loading whole file to memory

This is structure of my XML:

<?xml version="1.0" encoding="utf-8"?>
<posts>
  <row Id="4" PostTypeId="1" AcceptedAnswerId="7" CreationDate="2008-07-31T21:42:52.667" Score="756" ViewCount="63468" Body="&lt;p&gt;I want to use a &lt;code&gt;Track-Bar&lt;/code&gt; to change a &lt;code&gt;Form&lt;/code&gt;'s opacity.&lt;/p&gt;
&lt;p&gt;This is my code:&lt;/p&gt;
&lt;pre class=&quot;lang-cs prettyprint-override&quot;&gt;&lt;code&gt;decimal trans = trackBar1.Value / 5000;
this.Opacity = trans;
&lt;/code&gt;&lt;/pre&gt;
&lt;p&gt;When I build the application, it gives the following error:&lt;/p&gt;
&lt;blockquote&gt;
&lt;pre class=&quot;lang-none prettyprint-override&quot;&gt;&lt;code&gt;Cannot implicitly convert type decimal to double
&lt;/code&gt;&lt;/pre&gt;
&lt;/blockquote&gt;
&lt;p&gt;I have tried using &lt;code&gt;trans&lt;/code&gt; and &lt;code&gt;double&lt;/code&gt;, but then the &lt;code&gt;Control&lt;/code&gt; doesn't work. This code worked fine in a past VB.NET project.&lt;/p&gt;
" OwnerUserId="8" LastEditorUserId="3072350" LastEditorDisplayName="Rich B" LastEditDate="2021-02-26T03:31:15.027" LastActivityDate="2021-11-15T21:15:29.713" Title="How to convert a Decimal to a Double in C#?" Tags="&lt;c#&gt;&lt;floating-point&gt;&lt;type-conversion&gt;&lt;double&gt;&lt;decimal&gt;" AnswerCount="12" CommentCount="4" FavoriteCount="59" CommunityOwnedDate="2012-10-31T16:42:47.213" ContentLicense="CC BY-SA 4.0" />
  <row Id="6" PostTypeId="1" AcceptedAnswerId="31" CreationDate="2008-07-31T22:08:08.620" Score="313" ViewCount="22477" Body="&lt;p&gt;I have an absolutely positioned &lt;code&gt;div&lt;/code&gt; containing several children, one of which is a relatively positioned &lt;code&gt;div&lt;/code&gt;. When I use a &lt;code&gt;percentage-based width&lt;/code&gt; on the child &lt;code&gt;div&lt;/code&gt;, it collapses to &lt;code&gt;0 width&lt;/code&gt; on IE7, but not on Firefox or Safari.&lt;/p&gt;
&lt;p&gt;If I use &lt;code&gt;pixel width&lt;/code&gt;, it works. If the parent is relatively positioned, the percentage width on the child works.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;Is there something I'm missing here?&lt;/li&gt;
&lt;li&gt;Is there an easy fix for this besides the &lt;code&gt;pixel-based width&lt;/code&gt; on the child?&lt;/li&gt;
&lt;li&gt;Is there an area of the CSS specification that covers this?&lt;/li&gt;
&lt;/ol&gt;
" OwnerUserId="9" LastEditorUserId="9134576" LastEditorDisplayName="user14723686" LastEditDate="2021-01-29T18:46:45.963" LastActivityDate="2021-01-29T18:46:45.963" Title="Why did the width collapse in the percentage width child element in an absolutely positioned parent on Internet Explorer 7?" Tags="&lt;html&gt;&lt;css&gt;&lt;internet-explorer-7&gt;" AnswerCount="7" CommentCount="0" FavoriteCount="13" ContentLicense="CC BY-SA 4.0" />
</posts>

Can I load every row one by one without loading whole XML file into memory? For example printing all of the titles

Answer

Providing the XML file is structured exactly as shown in the example then BeautifulSoup could be used to parse relevant lines. Something like this:

from bs4 import BeautifulSoup as BS
with open('my.xml') as xml:
    for line in map(str.strip, xml):
        if line.startswith('<row'):
            soup = BS(line, 'lxml')
            if row := soup.find('row'):
                if title := row.get('title'):
                    print(title)

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Answer