Barcode from CZI metadata

[Omnistic]

Hi all,

I have a CZI file from which I want to extract the barcode number from the metadata. I managed to save the metadata as a XML file with the following code:

from bioio import BioImage

img = BioImage("my_image.czi")

import xml.etree.ElementTree as ET
print(ET.ElementTree(img.metadata).write("the_metadata.xml"))

And I can open the XML file with a text editor, and searching for "Barcode" leads to several matches among which I can find the relevant data: <Barcode>left barcode: XXXXXXXX</Barcode>. I was hoping I could do something to find this barcode right away, such as:

ET.ElementTree(img.metadata).find("barcode")

Unfortunately, it returns None. The whole XML structure is quite complex it seems, the Barcode seem to be part of LiveScanAdditionalSettings, which is itself part of AdditionalSettings, ...etc.
I am very new to Bioio and ElementTree.

Any help is appreciated. Thank you.

[Omnistic]

I have written a function that seems to work for me.

def extract_barcode(metadata):
    barcode_element = metadata.find("Metadata/AttachmentInfos/AttachmentInfo/Label/Barcodes/Barcode/Content")

    if barcode_element is None:
        barcode = None
    else:
        barcode = barcode_element.text.split(" ")[-1]

    return barcode

The function above can be used like so:

from bioio import BioImage

img = BioImage("my_image.czi")

print(extract_barcode(img.metadata)

In my case, I only have a single or no barcode in the metadata. The barcode is in the content element: Metadata/AttachmentInfos/AttachmentInfo/Label/Barcodes/Barcode/Content. The text of the content element is formatted as "left/right barcode: the_barcode". The function splits that string according to space characters and extract the last entry: the_barcode.