Overwrite values in XML file with values from another XML file

[Paqqno]

I have one main xml file (Mainfile_1.xml) where some items show value = 'FAIL'. I want to replace those Fail values with correct values from another XML file (Fixfile_1.xml). It should look like on the picture below:



So as you can see, values from Fixfile_1.xml should replace 'FAIL' values in Mainfile_1.xml for coresponding Item name and object id.

So far I wrote a code where I read both xml files and print only data related with Fail values. My MAIN PROBLEM is how to save it to a file so the failed values would be overwriten by values from fixfile_1.xml. "Tree.write" only delete "<?xml version='1.0' encoding='UTF-8'?>" line for some reason.

There is my code:

 import xml.etree.ElementTree as ET
    
    Mainfile = 'Mainfile_1.xml'
    tree = ET.parse(Mainfile)
    root = tree.getroot()
    fixfile = 'fixfile_1.xml'
    tree2 = ET.parse(fixfile)
    root2 = tree2.getroot()
    for objects in root.iter('object'):
        objabsno = objects.attrib.get('absno')
        for attributes in objects.getchildren():
            name = attributes.attrib.get('name')
            value = attributes.attrib.get('value')
            if value == 'FAIL':
                for objects2 in root2.iter('object'):
                    objabsno2 = objects2.attrib.get('absno')
                    for attributes2 in objects2.getchildren():
                        name2 = attributes2.attrib.get('name')
                        value2 = attributes2.attrib.get('value')
                        if objabsno2 == objabsno:
                            if name == name2:
                                print(name,name2,value,value2)
    tree.write('newMainfile_1.xml')

There is Mainfile_1.xml

    <?xml version='1.0' encoding='UTF-8'?>
    <Module bs='Mainfile_1'>
    <object name='namex' number='1' id='1000'>
        <item name='item0' value='100'/>
        <item name='item00' value='100'/>
    </object>
    <object name='namey' number='2' id='1001'>
        <item name='item1' value='100'/>
        <item name='item00' value='100'/>
    </object>
    <object name='name1' number='3' id='1234'>
        <item name='item1' value='FAIL'/>
        <item name='item2' value='233'/>
        <item name='item3' value='233'/>
        <item name='item4' value='FAIL'/>
    </object>
    <object name='name2' number='4' id='1238'>
        <item name='item8' value='FAIL'/>
        <item name='item9' value='233'/>
    </object>
    <object name='name32' number='5' id='2345'>
        <item name='item1' value='111'/>
        <item name='item2' value='FAIL'/>
    </object>
    <object name='name4' number='6' id='2347'>
        <item name='item1' value='FAIL'/>
        <item name='item2' value='FAIL'/>
        <item name='item3' value='233'/>
        <item name='item4' value='FAIL'/>
    </object>
    </Module>

And there is Fixfile_1.xml

    <?xml version='1.0' encoding='UTF-8'?>
    <Module bs='Mainfile_1'>
    <object id='1234'>
        <item name='item1' value='something
    more of something'/>
        <item name='item4' value='something
    more of something'/>
    </object>
    <object id='1238'>
        <item name='item8' value='something12
    more of something'/>
    </object>
    <object id='2345'>
        <item name='item2' value='something
    more of something'/>
    </object>
    <object id='2347'>
        <item name='item1' value='something14
    more of something'/>
        <item name='item2' value='something
    more of something'/>
        <item name='item4' value='something14
    something14
    something12
    more of something'/>
    </object>
    </Module>

And there is one more thing!! Because I have a lot of coresponding files like that (Mainfile_1.xml - Fixfile_1.xml, Mainfile_2.xml - Fixfile_2.xml,Mainfile_3.xml - Fixfile_3.xml, etc.) is there a way to open and overwrite them all at once?