Stories from the Web Crawling trenches in asyncio

Making Concurrent Requests with aiohttp in Python

Author: Mohan Ganesan

Date: Mar 3, 2024

When building applications with aiohttp in Python, it's common to need to make multiple requests concurrently rather than sequentially. Use asyncio.gather, reuse session, and avoid limits with asyncio.Semaphore for better performance.

Making Async HTTP Requests in Python

Author: Mohan Ganesan

Date: Feb 3, 2024

Python's requests library makes it easy to make synchronous HTTP requests in your code. But in async environments, like asyncio, you'll want to use an async HTTP client instead.

Combining AsyncIO and Multiprocessing in Python

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio library and multiprocessing module can be combined for improved resource utilization and cleaner code. Data passing between the two requires caution.

Running Asyncio Web Apps with aiohttp in Docker

Author: Mohan Ganesan

Date: Mar 3, 2024

Dockerizing aiohttp web apps requires the right base image, dependencies, and config. Limit workers, use dynamic ports, and handle graceful shutdowns.

Making Async HTTP Requests in Python with requests and asyncio

Author: Mohan Ganesan

Date: Feb 3, 2024

Python requests library provides API for HTTP requests. asyncio and aiohttp enable non-blocking requests. grequests uses asyncio for concurrent requests. asyncio is efficient for I/O heavy work.

Handling Errors Gracefully with Asyncio Retries

Author: Mohan Ganesan

Date: Mar 25, 2024

Implementing resilient retry logic in Asyncio apps using Python to handle transient errors and maintain availability.

Making Fast Parallel Requests with Asyncio

Author: Mohan Ganesan

Date: Feb 3, 2024

Asyncio is a powerful Python library for performing asynchronous I/O operations and running multiple tasks concurrently. It allows creating asynchronous code that executes out of order while waiting on long-running operations like network requests.

Unlocking Async Performance with Asyncio Redis

Author: Mohan Ganesan

Date: Mar 25, 2024

Redis is a popular in-memory data store known for its speed and versatility. By combining Redis with Python's asyncio module, you can build extremely fast and scalable applications.

Fixing the "ImportError: No Module Named aiohttp" Error in Python

Author: Mohan Ganesan

Date: Mar 3, 2024

ImportError: No module named aiohttp. Common causes: aiohttp module not installed, virtual environment without aiohttp, module name spelling, conflict with asyncio module.

Connecting to MQTT with Python's asyncio

Author: Mohan Ganesan

Date: Mar 25, 2024

MQTT is a lightweight messaging protocol used in IoT and mobile applications. Python's asyncio module makes it easy to handle MQTT subscriptions and publications asynchronously without blocking the main thread.

Making the Most of asyncio: Adding Tasks to Event Loops

Author: Mohan Ganesan

Date: Mar 25, 2024

The asyncio module in Python provides infrastructure for writing asynchronous code using the async/await syntax. The event loop is at the heart of asyncio and manages task execution. Enqueue tasks with loop.create_task() or ensure_future().

Asyncio task exception handling

Author: Mohan Ganesan

Date: Mar 25, 2024

Asynchronous programming with asyncio in Python has advantages and challenges. Proper exception handling is key to creating robust asyncio code.

Does asyncio use multiple cores python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module enables concurrency within a single thread, but not parallelism across multiple threads or processes. However, by utilizing multiprocessing or multithreading, we can achieve true parallelism.

Running multiple asyncio tasks

Author: Mohan Ganesan

Date: Mar 25, 2024

When writing async code in Python, asyncio provides two methods for running async tasks in parallel: asyncio.gather() and asyncio.create_task(). gather() bundles tasks and waits for them, while create_task() schedules background work.

Concurrency in Python: Understanding Asyncio vs Synchronous Code

Author: Mohan Ganesan

Date: Mar 17, 2024

Python is often used for building complex applications that handle multiple tasks concurrently. Understanding the difference between asyncio and synchronous code is key to writing efficient, scalable Python programs.

Async IO in Python: Trio vs. Asyncio

Author: Mohan Ganesan

Date: Mar 25, 2024

Python developers have two main options for asynchronous I/O concurrency - asyncio and Trio. Both allow you to write non-blocking, concurrent code in Python. But which one is better for your use case?

Speed Up Your Asyncio Code with Thread Pools

Author: Mohan Ganesan

Date: Mar 25, 2024

Asyncio is great for writing non-blocking network code in Python. But sometimes you have CPU-bound tasks that could benefit from parallel execution. That's where thread pools come in handy!

What is the difference between asyncio and time sleep in Python?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python provides asyncio module for concurrency and time.sleep for pausing execution. Use asyncio for parallelism and time.sleep carefully.

Is Python asynchronous or synchronous?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module enables asynchronous I/O for improved concurrency. Use asyncio for I/O-bound tasks and when concurrency is needed.

Making Asynchronous HTTP Requests in Python

Author: Mohan Ganesan

Date: Feb 3, 2024

Python Requests library provides simple interface for making HTTP requests. Supports synchronous and asynchronous requests using threads or processes.

Concurrency and Thread Safety in Python's asyncio

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module enables concurrency within a single thread using an event loop. Sharing data between coroutines is thread-safe. Multithreading requires new event loops and explicit synchronization. Blocking code must execute in threads to avoid blocking the event loop. Following these best practices ensures efficient, thread-safe asyncio code.

Async IO vs Thread Pools in Python: When to Use Each

Author: Mohan Ganesan

Date: Mar 17, 2024

Python provides two major approaches for concurrent and parallel programming: asyncio and thread pools. Choosing the right concurrency tool can impact performance, scalability, and code complexity.

What is the difference between asyncio and multithreading python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python developers often need to make their programs concurrent to improve performance. The two main options for concurrency in Python are asyncio and multithreading.

How many threads does asyncio use python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asyncio is a powerful framework in Python that enables writing asynchronous, non-blocking code using a single-thread event loop. It allows concurrency through cooperative multitasking and the use of additional threads for CPU-bound work.

Async IO and Futures in Python: What's the Difference?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asynchronous programming in Python with asyncio and futures. asyncio provides infrastructure for async I/O concurrency while futures represent eventual results of asynchronous operations.

Handling Errors Gracefully with Asyncio Exceptions

Author: Mohan Ganesan

Date: Mar 25, 2024

Asyncio provides an asynchronous programming framework in Python for non-blocking I/O code. Exception handling in asyncio requires special care, including handling CancelledError and propagating exceptions from tasks.

Making the Most of asyncio.run_until_complete()

Author: Mohan Ganesan

Date: Mar 25, 2024

The asyncio.run_until_complete() method is useful for running asyncio code. It has nuances to understand for effective usage.

What is alternate to asyncio in Python?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asyncio is Python's built-in asynchronous programming framework, but alternatives like Twisted and Trio are worth exploring.

What is the difference between parallel and async in Python?

Author: Mohan Ganesan

Date: Mar 24, 2024

Python offers two options for performing multiple tasks simultaneously: parallel programming, which leverages multiple CPU cores, and asynchronous programming, which allows long-running functions to yield control back while waiting.

Does asyncio run in parallel python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module enables concurrency, not parallelism, by using coroutines and an event loop.

Why is asyncio faster than threading python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module allows for non-blocking, asynchronous code execution, achieving better performance by minimizing blocking calls and maximizing CPU utilization.

Is Python async or sync?

Author: Mohan Ganesan

Date: Mar 24, 2024

New Python developers often get tripped up on the difference between asynchronous and synchronous execution. Asynchronous execution allows statements to run out of order without waiting. Python itself is synchronous, but it enables asynchronous execution through libraries like asyncio.

Build High Performance Asyncio Web Servers in Python

Author: Mohan Ganesan

Date: Mar 25, 2024

Python's asyncio module allows you to write non-blocking, event-driven network code. This makes it possible to build very high performance web servers that can handle thousands of concurrent connections with very low resource usage.

Does asyncio use multiple cores?

Author: Mohan Ganesan

Date: Mar 24, 2024

Asyncio enables concurrency, but not parallelism by default. You can achieve parallelism by integrating thread pools and process pools.

Asyncio Concurrency in Python: Unlocking Asynchronous Magic

Author: Mohan Ganesan

Date: Mar 25, 2024

Concurrency is essential for building responsive and scalable applications. Asyncio in Python allows for asynchronous code, making the most of hardware resources.

What is the future in asyncio python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asyncio enables asynchronous programming in Python. It is gaining popularity and offers performance improvements, new idioms, and integration with other languages. It is set to become an indispensable part of the Python ecosystem.

Understanding Asyncio Event Loops in Python

Author: Mohan Ganesan

Date: Mar 25, 2024

The event loop is the core of asyncio in Python, handling asynchronous code and callbacks. Properly managing the event loop is key to writing efficient asyncio programs.

Is asyncio part of Python?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module enables non-blocking concurrency, improving performance, scalability, and user experience.

What is the difference between asyncio and queue?

Author: Mohan Ganesan

Date: Mar 24, 2024

Asynchronous programming in Python with asyncio and queues. asyncio for I/O bound tasks, queues for CPU bound work. Different concurrency models and performance tradeoffs.

Keeping Track of Asyncio Loops in Python

Author: Mohan Ganesan

Date: Mar 25, 2024

Tips for detecting and keeping track of active asyncio loops in Python. Use get_running_loop() to get the current running loop. Use all_tasks() to iterate through scheduled tasks. Use contextvars to track the loop a task is running on.

Pushing Asyncio to the Limit: Understanding Concurrency Limits

Author: Mohan Ganesan

Date: Mar 25, 2024

The asyncio module in Python enables concurrent execution of code by running tasks asynchronously. It depends on factors like number of threads, nature of tasks, and settings.

Beyond Asyncio: Exploring Asynchronous Programming Options in Python

Author: Mohan Ganesan

Date: Mar 25, 2024

Asyncio is Python's built-in asynchronous programming framework, but there are alternative options like Twisted, Trio, and Curio for non-blocking applications.

Using Asyncio Conditions for Stateful Coroutines

Author: Mohan Ganesan

Date: Mar 25, 2024

Asyncio conditions allow coroutines to wait for certain states or events during execution. They are useful for scenarios where you need to coordinate or synchronize several coroutines based on shared state.

Asyncio events

Author: Mohan Ganesan

Date: Mar 25, 2024

Asyncio is a powerful feature in Python that allows you to write asynchronous, non-blocking code. It enables more responsive programs for I/O bound tasks like web scraping and network programming.

Leveraging Asynchronous I/O with Asyncio for Faster File Operations

Author: Mohan Ganesan

Date: Mar 25, 2024

Asynchronous I/O in Python with asyncio allows non-blocking file operations, optimizing applications with concurrent code and faster file processing.

Does asyncio run in single thread python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module allows concurrent code using a single-threaded event loop model, providing performance benefits for I/O bound workloads.

Does Python asyncio use threads?

Author: Mohan Ganesan

Date: Mar 24, 2024

Python's asyncio module provides single-threaded concurrency using coroutines and an event loop. It can offload blocking IO and CPU-bound tasks to thread pools.

How asyncio works in Python?

Author: Mohan Ganesan

Date: Mar 24, 2024

Python's asyncio module allows for writing concurrent code using async/await syntax. It provides an event loop, async functions, and the ability to run awaitables concurrently with asyncio.gather().

Asyncio gather usage

Author: Mohan Ganesan

Date: Mar 25, 2024

The asyncio module in Python provides powerful tools for writing asynchronous and concurrent code. One very useful function is asyncio.gather(), which allows you to simplify running multiple coroutines concurrently.

Is asyncio deprecated python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asyncio is an integral part of Python, providing efficient framework for writing asynchronous code. It allows concurrent execution without the complexity of threads or multiprocessing.

Async IO for Python: aiohttp 3.7.4

Author: Mohan Ganesan

Date: Mar 3, 2024

The aiohttp library provides asynchronous HTTP client/server functionality for Python based on the asyncio event loop. Version 3.7.4 contains useful updates that make aiohttp even more powerful and developer-friendly.

Making Python Asynchronous: An Introduction to asyncio

Author: Mohan Ganesan

Date: Mar 17, 2024

Asynchronous programming in Python with asyncio allows for concurrent execution, improved speed and efficiency. It is useful for network programming and database access.

Executing Asyncio Coroutines: How Often to Call run()

Author: Mohan Ganesan

Date: Mar 24, 2024

The asyncio.run() function is used to execute asyncio coroutine functions. It should generally only be called once per asyncio program to avoid unexpected behavior.

What is the difference between asyncio and synchronous?

Author: Mohan Ganesan

Date: Mar 24, 2024

Python includes both synchronous and asynchronous programming capabilities. Use synchronous code for simple scripts and CPU-bound processing. Use asyncio for I/O-bound work, parallel execution, and concurrency within a single thread.

What are the advantages of asyncio in Python?

Author: Mohan Ganesan

Date: Mar 17, 2024

Python's asyncio module opens up a whole new world of asynchronous programming, allowing code to execute concurrently and resulting in huge performance gains for I/O-bound applications.

What are the modes of asyncio python ?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asynchronous programming in Python using asyncio module for building responsive and scalable applications.

Is asyncio concurrent or parallel python?

Author: Mohan Ganesan

Date: Mar 17, 2024

Asyncio provides concurrency, not parallelism. It shines for I/O bound work and can achieve high performance. Use multiprocessing for CPU intensive tasks.

Concurrency in Python: Understanding Asyncio and Futures

Author: Mohan Ganesan

Date: Mar 24, 2024

Python provides powerful tools for handling concurrency and parallelism with asyncio and futures. Asyncio enables asynchronous I/O handling in a single thread, while futures handle parallelism across threads/processes.

Achieving Speed with Asyncio in Python

Author: Mohan Ganesan

Date: Mar 24, 2024

Python's asyncio library enables concurrency for improved performance, but not parallelism. It allows efficient use of I/O resources within a single thread.

Asyncio event loop

Author: Mohan Ganesan

Date: Mar 25, 2024

The asyncio module is a powerful tool for writing concurrent and asynchronous code. The event loop manages tasks and callbacks, allowing for efficient handling of thousands of concurrent requests.

Tired of getting blocked while scraping the web?

ProxiesAPI handles headless browsers and rotates proxies for you.
Get access to 1,000 free API credits, no credit card required!