dmtucker

#!/usr/bin/env bash
update_via_http () {
    if [ -z "${token+undefined}" ] || [ "$#" != 2 ]
    then
        echo 'usage: token=<your-HTTP-token> update_via_http zone ipv6' 1>&2
        exit 1
    fi
    zone="$1"
    ipv6="$2"
    # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=141323

dmtucker

import math


def apy(apr, periods=12):
  return (((apr / periods) + 1) ** periods) - 1


def apr(apy, periods=12):
  return (((apy + 1) ** (1 / periods)) - 1) * periods

dmtucker

#!/usr/bin/env python3


ROMAN_LEGEND = {
  'I': 1,
  'V': 5,
  'X': 10,
  'L': 50,
  'C': 100,
  'D': 500,

dmtucker

import os
import py

def _relpath(path, *, relto):
    # TODO py35+ commonpath = os.path.commonpath([path, relto])
    commonpath = str(py.path.local(path).common(py.path.local(relto)))

    def _commonpath_to(_path):
        return _path[len(commonpath):].strip(os.path.sep)

dmtucker

say we claim support for >=1, <3

• 1.0 is the first supported version.
  • if this isn't tested, features from later versions may be depended on that break compatibility with this version.
• 1.x adds to it.
  • test the latest version available to detect new features that collide (e.g. variables named async are fine in python 3.6 but async becomes a keyword in python 3.7).
    • only the latest version needs to be tested because features cannot be removed without a major version bump.
  • if something breaks, either
    • a new feature collided with existing code
    • upstream did not follow semver and broke compatibility
• existing code uses upstream code that is not part of the public API

dmtucker

• https://www.bernat.tech/pep-517-and-python-packaging/
• https://caremad.io/posts/2013/07/setup-vs-requirement/
• https://nedbatchelder.com/text/names1.html
• https://nedbatchelder.com/text/unipain.html
• https://blog.ionelmc.ro/2014/05/25/python-packaging/
• https://blog.ionelmc.ro/presentations/packaging/#slide:14
• https://datagrok.org/python/activate/

dmtucker

• setuptools builds distributions from source code.
• pip (un)installs distributions (optionally, from PyPI).
  • twine publishes distributions to PyPI.
• pytest tests installed distributions.

dmtucker

why doesn't it make sense to mix strings and bytes in path components with posixpath.join? this Q is really only for py2 since 3 does away with implicit conversions, but the unicode could be encoded and the join would succeed. even if that results in a multi-encoding str, I've been told, that's ok in POSIX

dmtucker

$ python3 sep.py 
different: cp037 b'a'
different: cp273 b'a'
different: cp424 b'a'
different: cp500 b'a'
different: cp875 b'a'
different: cp1026 b'a'
different: cp1140 b'a'
untested: cp65001
different: utf_32 b'\xff\xfe\x00\x00/\x00\x00\x00'

dmtucker

What's up with Python 1.17 in the PyPI stats database?