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python [9217175f]

Tags: computers

CGI scripts:
- www.tutorialspoint.com/python/python_cgi_programming.htm

Context sensitivity: groups.google.com/g/comp.theory/c/nJzOyRnAP3k/m/AInZxo48FNIJ?pli=1

1. Performance Python

1.1. Vectorcall

peps.python.org/pep-0590/
C API to optimize calling of objects
tp_call too slow
- Also one function pointer per class, rather than per object. So classes create a lot of intermediate objects

2. Cpython

Every object is defined by a C struct called PyTypeObject. This struct contains slots.

3. Parsing PDF's in Python

You can use:
- pypdf. or pypdf4
- pdfminer
  - also pypdfparser
- textract -> textract.readthedocs.io/en/stable/python_package.html
- poppler -> pdf rendering engine?
- OCR -> tesseract with pytesseract, preprocess with opencv
- tika.with the python tika interface

4. Difflib

docs.python.org/3/library/difflib.html
generates diffs
- has a series of diffs that allow for fleixible computing of sequences including:
  - html
  - pure strings (get_close_matches)
  - number type diffs

5. OS

CPU Count:
- docs.python.org/3/library/os.html#os.cpu_count
- docs.python.org/3/library/os.html#os.sched_getaffinity is not available on all platforms

6. Discussion Forum Changing from Mailing List

lwn.net/Articles/901744/
- Scattered community upon mailing lists, was scattered between PR's, Issues, python-dev, python-committers, etc
- Unification on Discourse

7. Python Concurrency

superfastpython.com/python-concurrency-choose-api/
- Coroutine (asyncio) vs thread (threading) vs process (multiprocessing)

8. Python JIT