antonagestam

Setting up serial on Raspberry Pi 3

Disable bluetooth and setup serial on /dev/ttyAMA0

1. /boot/config.txt must contain:

enable_uart=1
dtoverlay=pi3-disable-bt

antonagestam

import weakref


class Same:
    __the = None

    def __new__(cls, *args, **kwargs):
        if cls.__the is None or cls.__the() is None:
            obj = super(Same, cls).__new__(cls)
            cls.__the = weakref.ref(obj)

antonagestam

import multiprocessing
import functools
import logging
from typing import Callable


class TimeLimitExceeded(Exception):
    pass

antonagestam

from __future__ import annotations

import json
from typing import Any, Dict, List, Tuple, Union, cast

from typing_extensions import Protocol, runtime

# Type has to be ignored until mypy support recursive types (should be
# soon-ish, see mypy#731). This means that type errors one step down in a dict
# hierarchy will not be detected, since the "recursed" type will be interpreted

antonagestam

defaults write com.apple.dock autohide-time-modifier -int 0; killall Dock
defaults write com.apple.Dock autohide-delay -float 0; killall Dock

antonagestam

from typing import Callable, TypeVar
import functools

A = TypeVar('A')
B = TypeVar('B')
C = TypeVar('C')


def combine(f: Callable[[B], C], g: Callable[[A], B]) -> Callable[[A], C]:
    def h(x: A) -> C:

antonagestam

import re
import sys
import json

var_pattern = re.compile(r'^(?!\[)(?P<var>[A-z_-]+)\s*(?:=\s*(?P<val>.*))?$')
scope_pattern = re.compile(r'^\s*\[(?P<scope>[A-z_-]+)\]\s*$')


def get_lines(file_path):
    with open(file_path, 'r') as f:

antonagestam

class Reusing:
    __free = []

    def __new__(cls, *args, **kwargs):
        try:
            return cls.__free.pop()
        except IndexError:
            return super(Reusing, cls).__new__(cls)

    def __del__(self):

antonagestam

$ systemctl enable rqworker@worker0{1..4}.service
$ systemctl start rqworker@worker0{1..4}.service
$ systemctl status 'rqworker@*'
$ journalctl -u 'rqworker@*'

antonagestam

#!/usr/bin/env bash

set -euo pipefail

get_from () {
    local file=$1
    local variable=$2
    echo "$(
        source "$file" > /dev/null
        eval "echo \"\$$variable\""