Why are input and output operations in Python usually implemented using asynchronous methods?

Input/output (I/O) operations in Python are often blocking, meaning that the program pauses during such operations, waiting for the action to complete (for example, reading a file or receiving data over the network). Asynchronous methods allow not to block the main execution thread, running I/O operations in parallel with other tasks. This increases the performance and responsiveness of applications, especially when working with a large number of network requests or file operations.

Example of using asynchronous input/output with the asyncio library:

import asyncio

async def fetch_data():
    print("Starting data download...")
    await asyncio.sleep(2)  # simulating an asynchronous I/O operation
    print("Data loaded")

async def main():
    await asyncio.gather(fetch_data(), fetch_data())

asyncio.run(main())

Here, two operations run in parallel, without blocking each other.