Python Versus Nim: Async

0README.md

Python Versus Nim: Async

• No performance benchmark.
• Python ⟿ PEP-8
• Nim ⟿ NEP1
• Python ⟿ 3.7
• Nim ⟿ 0.19
• No Ofuscation, no Code-Golf.

This is to compare elegant, simple, expressive code. :cat:

1hello.nim

import asyncdispatch

proc helloWorld() {.async.} =
  echo "Hello World"

wait_for helloWorld()

1hello.py

import asyncio


async def async_function():
    print("Hello World")

asyncio.run(async_function())

async_class.nim

import asyncdispatch, os

type SomeObject = object
  limit: int

iterator items(self: SomeObject): int =
  for i in 0..self.limit:
    sleep 1_000
    yield i

proc asyncFunction() {.async.} =
  for i in SomeObject(limit: 9):
    echo i

wait_for asyncFunction()

async_class.py

import asyncio


class SomeObject(object):

    def __init__(self, limit):
        self.limit = limit

    def __aiter__(self):
        return self

    async def __anext__(self):
        if not self.limit:
            raise StopAsyncIteration

        self.limit -= 1
        await asyncio.sleep(1)
        return self.limit


async def async_function():
    async for date in SomeObject(9):
        print(date)

asyncio.run(async_function())

multithreading.nim

import asyncdispatch, threadpool

proc threadedFunction(i: int) {.async.} =
  echo i

proc asyncFunction() {.async.} =
  for i in 0..9:
    discard spawn: threadedFunction(i)

wait_for asyncFunction()

multithreading.py

import asyncio


def threaded_function(i):
    print(i)

async def async_function():
    for i in range(9):
        await loop.run_in_executor(None, threaded_function, i)

loop = asyncio.get_event_loop()
loop.run_until_complete(async_function())

recursive.nim

import asyncdispatch

proc asyncFunction(counter = 9) {.async, discardable.} =
  echo counter
  var count = counter
  dec count
  if count > 0:
    discard sleepAsync(1_000)
    asyncFunction(count)

wait_for asyncFunction()

recursive.py

import asyncio


def async_function(counter=9):
    print(counter)
    counter -= 1
    if counter:
        loop.call_later(1, async_function, counter)
    else:
        loop.stop()

loop = asyncio.get_event_loop()
loop.call_soon(async_function)
loop.run_forever()

while.nim

import asyncdispatch

proc asyncFunction() {.async.} =
  var remaining = 9
  while true:
    echo remaining
    dec remaining
    if not (remaining > 0):
      break
    await sleepAsync(1_000)

wait_for asyncFunction()

while.py

import asyncio


async def async_function():
    remaining = 9
    while True:
        print(remaining)
        remaining -= 1
        if not remaining:
            break
        await asyncio.sleep(1)

asyncio.run(async_function())