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Ask HN: What are some tools / libraries you built yourself?
264 projects | news.ycombinator.com | 16 May 2021
I've been working on gazpacho  for last two years.
It's a general purpose web scraping library for Python that replaces BeautifulSoup + requests for most projects.
Just surpassed ~2K downloads every week!
13 ways to scrape any public data from any website
6 projects | dev.to | 7 Oct 2022
Parsel is a library build to extract data from XML/HTML documents with XPath and CSS selectors support, and could be combined with regular expressions. It's usees lxml parser under the hood by default.
lazy and fast .mpd file parser - for video streaming
2 projects | reddit.com/r/Python | 13 Aug 2022
So, now that I no longer work in that industry, and I had some free time, I created a lazy parsing package using lxml instead of the xml parser in the standard library, which can help people who want to have a python only parsing solution.
There is framework for everything.
107 projects | reddit.com/r/ProgrammerHumor | 4 Aug 2022
Parsing XML file deletes whitespace. How to avoid it?
2 projects | reddit.com/r/learnpython | 2 Apr 2022
I got curious about this now so I did some tests on my own, and it appears that the XML parser implementation in Python does indeed strip all newline characters from attributes. Whether this is according to XML standard I do not know; I also briefly tried an alternative XML implementation for Python and it behaves the same, so I would assume that this is standard behavior, but I'm not knowledgable enough about XML to say for certain.
Use case for ETL over ELT?
2 projects | reddit.com/r/dataengineering | 27 Mar 2022
I use lxml for the XML parsing and pyodbc as the ODBC library. We have a small team so I just keep it as simple as possible: 1. A cursor yields the XML documents from a SQL query as a stream 2. A generator function parses the XML document and yields the rows (you could parallelize this step) 3. Stream each of the resulting rows to a single CSV file 4. Scoop up the resulting CSV file into the target database (usually with the DB engine's loader; bulk insert isn't so fast over ODBC) It ends up being a straight forward, low-overhead approach.
How do i go about building a vidoe conferencing app?
10 projects | reddit.com/r/rust | 20 Aug 2021
Generally, I'm already using Python to glue together things like OpenCV or libxml, which do the heavy-lifting, and taking advantage of how things like Qt's QImage release Python's Global Interpreter Lock, allowing me to load and process images on a background thread, so the Python code itself is usually already I/O-bound, but yes. If the Python code would become a bottleneck, it helps with that too.
Big brained meme I created
2 projects | reddit.com/r/ProgrammerHumor | 25 Jul 2021
Where to start: Learning Web-scraping
2 projects | reddit.com/r/learnpython | 26 Jun 2021
lxml is an XML parser however, it also supports HTML parsing. It's blazing fast and supports XPath. I think it isn't as beginner friendly to use, though it has detailed documentation. It works less well with heavily broken HTML documents and the encoding detection isn't as good as the one of BS4.
Python is better than C they said
4 projects | reddit.com/r/ProgrammerHumor | 6 Jun 2021
According to lxml benchmarking docs, Python’s built in xml parser wouldn’t behave that bad either: https://github.com/lxml/lxml/blob/master/doc/performance.txt4 projects | reddit.com/r/ProgrammerHumor | 6 Jun 2021
What are some alternatives?
xmltodict - Python module that makes working with XML feel like you are working with JSON
html5lib - Standards-compliant library for parsing and serializing HTML documents and fragments in Python
untangle - Converts XML to Python objects
selectolax - Python binding to Modest and Lexbor engines (fast HTML5 parser with CSS selectors).
pyquery - A jquery-like library for python
bleach - Bleach is an allowed-list-based HTML sanitizing library that escapes or strips markup and attributes
rust-cpython - Rust <-> Python bindings
xhtml2pdf - A library for converting HTML into PDFs using ReportLab
MarkupSafe - Safely add untrusted strings to HTML/XML markup.