Enforcer

"""
env LINE_PROFILE=1 python 00_tricky.py
python -m line_profiler -rtmz profile_output.lprof
"""
import time
from enum import StrEnum
from line_profiler import profile


class State(StrEnum):

Enforcer

# tested on Python3.9 with just injector installed (pip install injector==0.18.4)
from dataclasses import dataclass
from typing import TypeVar, Generic

from injector import Injector, Module, provider


TCommand = TypeVar("TCommand")

Enforcer

redis_connection = StrictRedis(host='redis')

# source: https://redis.io/topics/distlock
# This will be used to release lock IF AND ONLY IF we have acquired it
REMOVE_ONLY_IF_OWNER_SCRIPT = \
"""if redis.call("get",KEYS[1]) == ARGV[1] then
    return redis.call("del",KEYS[1])
else
    return 0
end

Enforcer

@app.task(soft_time_limit=5, time_limit=10)
def time_limited_task():
    """
    This task has time limits to ensure it will never work for
    longer than anticipated.

    soft_time_limit is a number of seconds when SoftTimeLimitExceeded
    is raised to give a moment to clean up.
    time_limit is a number of seconds after task is terminated unconditionally
    """

Enforcer

def test_dashboard_requires_login(client):
    user = User.objects.create(...)  # 1
    
    response = client.get('/dashboard')  # 2
    
    self.assertRedirects(response, '/accounts/login')  # 3
    assert user.last_access_attempt = ...  # 4

Enforcer

defmodule Router do
    def get do
        
    end

    def owner_id_currency_to_name(owner_id, currency_id) do
        try do
            String.to_existing_atom("wallet-#{owner_id}-#{currency_id}")
          rescue
            ArgumentError -> String.to_atom("wallet-#{owner_id}-#{currency_id}")

Enforcer

defmodule StackAgent do
    use Agent
  
    def start(initial_value) do
      Agent.start(fn -> initial_value end, name: __MODULE__)
    end
  
    def value() do
      Agent.get(__MODULE__, fn state -> state end)
    end

Enforcer

defmodule IntegrationTest do
  use ExUnit.Case, async: true
  use Plug.Test

  alias Wallets.Router
  @opts Router.init([])

  test "getting balance creates new wallet with balance 0" do
    conn = conn(:get, "/balance")
    |> Router.call(@opts)

Enforcer

defmodule Wallets.Router do
  use Plug.Router

  plug(:match)
  plug(:fetch_query_params)
  plug(:dispatch)

  get "/balance" do
    send_resp(conn, 200, "Not implemented")
  end

Enforcer

import asyncio

class EchoClientProtocol(asyncio.Protocol):
    def __init__(self, message, loop):
        self.message = message
        self.loop = loop

    def connection_made(self, transport):
        transport.write(self.message.encode())
        print('Data sent: {!r}'.format(self.message))