利用PyCharm Profile分析异步爬虫效率详解

import requests
import bs4
from colorama import Fore


def main():
 get_title_range()
 print("Done.")


def get_html(episode_number: int) -> str:
 print(Fore.YELLOW + f"Getting HTML for episode {episode_number}", flush=True)

 url = f'https://talkpython.fm/{episode_number}'
 resp = requests.get(url)
 resp.raise_for_status()

 return resp.text


def get_title(html: str, episode_number: int) -> str:
 print(Fore.CYAN + f"Getting TITLE for episode {episode_number}", flush=True)
 soup = bs4.BeautifulSoup(html, 'html.parser')
 header = soup.select_one('h1')
 if not header:
  return "MISSING"

 return header.text.strip()


def get_title_range():
 # Please keep this range pretty small to not DDoS my site. ;)
 for n in range(185, 200):
  html = get_html(n)
  title = get_title(html, n)
  print(Fore.WHITE + f"Title found: {title}", flush=True)


if __name__ == '__main__':
 main()

import asyncio
from asyncio import AbstractEventLoop

import aiohttp
import requests
import bs4
from colorama import Fore


def main():
 # Create loop
 loop = asyncio.get_event_loop()
 loop.run_until_complete(get_title_range(loop))
 print("Done.")


async def get_html(episode_number: int) -> str:
 print(Fore.YELLOW + f"Getting HTML for episode {episode_number}", flush=True)

 # Make this async with aiohttp's ClientSession
 url = f'https://talkpython.fm/{episode_number}'
 # resp = await requests.get(url)
 # resp.raise_for_status()

 async with aiohttp.ClientSession() as session:
  async with session.get(url) as resp:
   resp.raise_for_status()

   html = await resp.text()
   return html


def get_title(html: str, episode_number: int) -> str:
 print(Fore.CYAN + f"Getting TITLE for episode {episode_number}", flush=True)
 soup = bs4.BeautifulSoup(html, 'html.parser')
 header = soup.select_one('h1')
 if not header:
  return "MISSING"

 return header.text.strip()


async def get_title_range(loop: AbstractEventLoop):
 # Please keep this range pretty small to not DDoS my site. ;)
 tasks = []
 for n in range(190, 200):
  tasks.append((loop.create_task(get_html(n)), n))

 for task, n in tasks:
  html = await task
  title = get_title(html, n)
  print(Fore.WHITE + f"Title found: {title}", flush=True)


if __name__ == '__main__':
 main()