Python lxml - Extracting Attributes from Nested XML Elements with Namespaces
I've been working on this all day and I'm working on a project and hit a roadblock... I'm stuck on something that should probably be simple. I'm working with an XML document that contains multiple namespaces and nested elements. I'm using the `lxml` library in Python to parse it, but I'm having trouble extracting attributes from elements that are deeply nested within different namespace definitions. For instance, here’s a simplified version of my XML: ```xml <root xmlns:ns1="http://example.com/ns1" xmlns:ns2="http://example.com/ns2"> <ns1:item id="1"> <ns2:details> <ns2:name>Item One</ns2:name> </ns2:details> </ns1:item> <ns1:item id="2"> <ns2:details> <ns2:name>Item Two</ns2:name> </ns2:details> </ns1:item> </root> ``` I want to extract the `id` attributes from `<ns1:item>` elements and the `name` elements from inside `<ns2:details>`. However, when I try to access these elements using the namespaces, I keep getting the following error: `ValueError: Missing namespace for element` or I end up with empty results. Here’s the code I’ve attempted: ```python from lxml import etree xml_data = '''<root xmlns:ns1="http://example.com/ns1" xmlns:ns2="http://example.com/ns2"> <ns1:item id="1"> <ns2:details> <ns2:name>Item One</ns2:name> </ns2:details> </ns1:item> <ns1:item id="2"> <ns2:details> <ns2:name>Item Two</ns2:name> </ns2:details> </ns1:item> </root>''' namespaces = { 'ns1': 'http://example.com/ns1', 'ns2': 'http://example.com/ns2' } tree = etree.fromstring(xml_data) items = tree.findall('.//ns1:item', namespaces=namespaces) for item in items: item_id = item.get('id') name = item.find('.//ns2:name', namespaces=namespaces) print(f'Item ID: {item_id}, Name: {name.text if name is not None else "N/A"}') ``` This code doesn’t raise an error but returns `None` for the name attribute. I’ve also tried specifying the full XPath with namespaces directly in the `find` method, but I get the same result. Any advice on how to properly access these nested elements with their namespaces would be greatly appreciated! This is part of a larger API I'm building. Any help would be greatly appreciated! My development environment is Windows. I'm coming from a different tech stack and learning Python. Hoping someone can shed some light on this.