jaymecd

Based on this blogpost.

To sign Git commits, you need a gpg key. GPG stands for GNU Privacy Guard and is the de facto implementation of the OpenPGP message format. PGP stands for ‘Pretty Good Privacy’ and is a standard to sign and encrypt messages.

Setting up

Install with Homebrew:

$ brew install gpg

jaymecd

#!/usr/bin/env python3
from __future__ import annotations

import sys
from collections import Counter
from pathlib import Path
from typing import List, Mapping, NamedTuple, Sequence
import enum

jaymecd

#!/usr/bin/env python3

from pprint import pprint
from typing import List, NamedTuple, Optional

with open('data.txt') as fp:
    lines = iter(fp.read().splitlines(False))


class Num(int):

jaymecd

start a contaniner:

$  docker run --rm -ti --privileged alpine:latest sh

next, run code within a container

setup:

jaymecd

from __future__ import annotations

import boto3
from functools import lru_cache
import dataclasses as dc
import uuid


def _reconstruct_params(cls, params: dict) -> dict:
    if not hasattr(cls, '__dc_field_names'):

jaymecd

#!/user/bin/env bash

# run as ./relative_time 2021-05-06T20:37:59Z

relative_time() {
  declare -r dt="$1"
  declare ts_then ts_now retval

  ! { ts1=$(date +%s -d "${dt}"); retval=$?; }

jaymecd

GNU Make Cheatsheet

Based on https://www.gnu.org/software/make/manual/html_node/Quick-Reference.html

Directives

Directive	Description
define variable define variable = define variable := define variable ::= define variable += define variable ?= endef	Define multi-line variables.
undefine variable	Undefining variables.

jaymecd

How do I round to 2 decimals?

In python, you have floats and decimals that can be rounded. If you care about the accuracy of rounding, use decimal type. If you use floats, you will have issues with accuracy.

All the examples use demical types, except for the original value, which is automatically casted as a float.

To set the context of what we are working with, let's start with an original value.

Original Value

jaymecd

#!/usr/bin/env python3

import asyncio
from typing import List, Awaitable


async def slow_job(delay: int):
    print(f"running slow_job with {delay}s delay ...")
    await asyncio.sleep(delay)
    print(f"slow_job with {delay}s delay is done")

jaymecd

#!/usr/bin/env bash

#/ Sample command to perform update and query it's status
#/
#/ Usage: <SELF_NAME> [-h|--help] <command>
#/
#/ Available commands:
#/     one      - perform some update, idempotent
#/                usage: <SELF_NAME> one <arg1> [arg2]
#/     two      - query status of update