Now to start the coroutine, we have to put the coroutine inside the event loop by using the get_event_loop() method of asyncio and finally, the event loop is executed using the run_until_complete() method of asyncio.ĭownloading files using Python is fun. Then we have another async coroutine calls the get_url and waits for the URLs and make a queue of all URLs. In this code, we created an async coroutine function that downloads our files in chunks and saves them with a random file name and returns a message. Return 'Successfully downloaded ' + file_nameĪsync with aiohttp.ClientSession() as session: Now let’s create a code using a coroutine to download files from the web: import asyncioĪsync for data in _chunked(1024): Inside the body of the coroutine, we have the await keyword, which returns a certain value. The keyword async tells that this is a native asyncio coroutine. We will import the async_timeout module to handle timeouts. To use the asyncio event handling and coroutine functionality, we will import the asyncio module: import asyncioĪlso, we need to install aiohttp module. The asyncio module uses coroutines for event handling. The reaction can be calling another function. It works around an event loop that waits for an event to occur and then reacts to that event. You can use the asyncio module to handle system events. For this, we will call the resource() method of boto3 and pass the service which is s3: service = boto3.resource(‘s3’)įinally, download the file by using the download_file method and pass in the variables: service.Bucket(bucket).download_file(file_name, downloaded_file) Now initialize a variable to use the resource of a session. Initialize the variables: bucket = "bucketName"
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