Python 异步操作文件 aiofiles

tianv5

于 2020-07-31 16:39:03 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/sunt2018/article/details/107716615

本文介绍使用aiofiles进行异步文件读写的Python编程技巧。通过示例代码展示如何利用asyncio和aiofiles库实现异步文件写入与读取，提高IO密集型应用的性能。

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# 异步文件操作
# pip install aiofiles

# 基本用法
import asyncio
import aiofiles


async def wirte_demo():
    # 异步方式执行with操作,修改为 async with
    async with aiofiles.open("text.txt","w",encoding="utf-8") as fp:
        await fp.write("hello world ")
        print("数据写入成功")

async def read_demo():
    async with aiofiles.open("text.txt","r",encoding="utf-8") as fp:
        content = await fp.read()
        print(content)

async def read2_demo():
    async with aiofiles.open("text.txt","r",encoding="utf-8") as fp:
        # 读取每行
        async for line in fp:
            print(line)
if __name__ == "__main__":
    asyncio.run(wirte_demo())
    asyncio.run(read_demo())
    asyncio.run(read2_demo())