变更

python爬虫/异步http请求.py

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+import asyncio
+import aiohttp
+
+# 案例优美图库
+
+urls = [
+    'http://kr.shanghai-jiuxin.com/file/bizhi/20220927/vif3daynop3.jpg',
+    'http://kr.shanghai-jiuxin.com/file/bizhi/20220927/0yrighfazhu.jpg',
+    'http://kr.shanghai-jiuxin.com/file/bizhi/20220927/rggtiwgnyzj.jpg'
+]
+
+
+async def aiodownload(url):
+    # 发送请求、得到图片内容、保存图片
+    # s = aiohttp.ClientSession()# 等价于request模块
+    name = url.rsplit('/', 1)[1]
+    async with aiohttp.ClientSession() as session:
+        async with session.get(url) as r:
+            # 请求完,写入文件
+            with open(name, mode='wb') as f:
+                t = await r.content.read()
+                f.write(t)  # 读取是异步的，需要await
+
+
+async def main():
+    tasks = []
+    for url in urls:
+        tasks.append(aiodownload(url))
+
+    await asyncio.wait(tasks)
+
+if __name__ == '__main__':
+    asyncio.run(main())