Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallPython offers two practical ways to find XML elements with XPath-style paths: the built-in xml.etree.ElementTree module for a limited subset, and lxml.etree when you need XPath 1.0. Choose based on the expression your task requires—not on an assumption that both libraries support the same XPath language.
Choose the right Python XPath approach
| Need | Use | Why |
|---|---|---|
| A few straightforward paths and no extra dependency | xml.etree.ElementTree |
It is included with Python and supports a limited set of XPath-style lookups. Python’s ElementTree documentation explicitly describes this as limited support. |
| XPath functions, richer predicates, or other XPath 1.0 expressions | lxml.etree |
It evaluates XPath 1.0 expressions with .xpath(). See the lxml XPath guide. |
| Namespace-aware queries or changing values in an expression | lxml.etree |
Its XPath call accepts prefix-to-URI namespace mappings and variable arguments, documented in the lxml XPath guide. |
ElementTree is not a full XPath engine: do not assume that every XPath function, axis, or expression will work. If a required expression falls outside its supported subset, use a full XPath implementation such as lxml rather than trying to force the expression into a simpler path.
Use XPath-style paths with ElementTree
The following runnable example parses an XML string, selects direct child books, then finds titles beneath books anywhere in the tree:
import xml.etree.ElementTree as ET
xml_text = """<catalog>
<book id="b1"><title>XPath Basics</title></book>
<book id="b2"><title>Python XML</title></book>
</catalog>"""
root = ET.fromstring(xml_text)
books = root.findall("./book")
matching_titles = root.findall(".//book/title")
for title in matching_titles:
print(title.text)./bookselectsbookchildren directly under the current element..//book/titlesearches descendants for abookand then itstitlechild.
ElementTree also documents support for selected forms such as parent steps, attribute predicates, and positional predicates. Consult the supported syntax in the official documentation before using a more involved expression; the module’s scope is deliberately limited.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Use full XPath 1.0 with lxml
Install lxml in the environment running your script with python -m pip install lxml. Then parse the XML and call .xpath() on an element or tree:
from lxml import etree
xml_text = """<catalog>
<book id="b1"><title>XPath Basics</title></book>
<book id="b2"><title>Python XML</title></book>
</catalog>"""
root = etree.fromstring(xml_text.encode())
books = root.xpath("//book[@id='b2']")
print(books[0].findtext("title"))The XPath expression selects every book with an id attribute equal to b2. The returned value is a list; this example reads the first match. If a match is not guaranteed, check that the list is non-empty before indexing it.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Handle namespaces in lxml queries
In XML with a default namespace, element names are namespace-qualified even if the source has no visible prefix. Bind a convenient prefix to the namespace URI in the XPath call and use that prefix in the expression:
from lxml import etree
xml_ns = b'<root xmlns="urn:catalog"><item>Example</item></root>'
ns_root = etree.fromstring(xml_ns)
items = ns_root.xpath("//c:item", namespaces={"c": "urn:catalog"})
print(items[0].text)The prefix c is chosen for the query; it maps to the namespace URI urn:catalog. Supply the prefix-to-URI mapping in namespaces when evaluating the expression.
Recommended Free Tools
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Pass changing values as XPath variables
When a value changes between calls, keep it out of the XPath string and pass it as a variable. lxml documents variable arguments for XPath evaluation:
book_id = "b2"
find_by_id = root.xpath("//book[@id=$book_id]", book_id=book_id)This keeps the query expression separate from the supplied value. Avoid building XPath strings by interpolating input into the expression.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Common problems and fixes
- An ElementTree expression is rejected or returns no match: the expression may use syntax outside ElementTree’s limited supported subset, or its path may not match the document structure. Check the official supported syntax and use lxml for XPath 1.0 features.
- A namespace query returns no elements: namespaced tags must be queried with a prefix mapped to the namespace URI in lxml. Add a
namespacesmapping and use that prefix in the XPath. - Indexing the result raises an error: an XPath lookup can return an empty list. Check for a match before accessing an item by index.
ModuleNotFoundError: No module named 'lxml': install lxml into the same Python environment that runs the script withpython -m pip install lxml.
Performance and dependency trade-offs
ElementTree avoids adding a library dependency when its supported path lookups are sufficient. lxml adds a dependency but supplies XPath 1.0 evaluation and documented namespace and variable support. There is no general speed winner established here: performance depends on document size, query shape, parser settings, and library versions. For a performance-sensitive workload, benchmark your own representative XML and queries in the deployment environment.
Or skip the browser setup:
XPath is for querying XML, not for capturing web pages. If your next task is getting a clean website screenshot, ScreenshotNeo returns an image or PDF from one GET request. For example, with cURL:
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. It removes cookie banners, newsletter popups, and chat widgets before capture; bot checks, blank pages, and failed loads are never billed. Its MCP server lets AI agents use screenshot tools. The Free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Sign up for free and get 1,000 screenshots a month with no card.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
