PyScript vs. JavaScript: A Battle of Web Titans
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Well, because data science isn\u2019t only about building powerful models, engaging in advanced analytics, or cleaning and transforming data\u2014presenting the results is also a key part of our job<\/strong>. And there are several ways to do it: PowerPoint presentations, interactive dashboards (like Tableau), or, as you\u2019ve guessed, through a website.<\/p>\n Speaking from personal experience, I work daily on developing the website we use to present our data-driven results. Using a website instead of PowerPoints or Tableau has many advantages, with freedom and customization<\/strong> being the biggest ones.<\/p>\n Even though I\u2019ve come to (kind of) enjoy JavaScript, it will never match the fun of coding in Python. Luckily, at FOSDEM, I learned about PyScript<\/strong>, and to my surprise, it\u2019s not as alpha as I initially thought.<\/p>\n But is that enough to call it a potential JavaScript replacement? That\u2019s exactly what we\u2019re going to explore today.<\/p>\n JavaScript has been the king of web development for decades. It\u2019s everywhere: from simple button clicks to complex web apps like Gmail and Netflix. But now, there\u2019s a challenger stepping into the ring\u2014PyScript<\/strong>\u2014a framework that lets you run Python in the browser<\/strong> without needing a backend.Sounds like a dream, right? Let\u2019s break it down in an entertaining head-to-head battle<\/strong> between these two web technologies to see if PyScript is a true competitor!<\/p>\n This is like the Jake Paul vs Mike Tyson battle: the new challenger (PyScript) vs the veteran champion (JS). Don\u2019t worry, I\u2019m not saying today\u2019s battle will be a disappointment as well.<\/p>\n Let\u2019s start with the veteran: JavaScript<\/strong>.<\/p>\n Now onto the novice: PyScript<\/strong>.<\/p>\n This last but<\/em> is a big one, so JavaScript wins the first round!<\/p>\n When it comes to speed, JavaScript is like Usain Bolt\u2014optimized and blazing fast<\/strong>. It runs natively in the browser and is fine-tuned for performance. On the other hand, PyScript runs Python via WebAssembly, which means extra overhead<\/strong>.<\/p>\n Let\u2019s use a real mini-project: a simple counter app. We\u2019ll build it using both alternatives and see which one performs better.<\/p>\n Putting them to the test:<\/p>\n End of round: JS increases its advantage making it 2-0!<\/p>\n Neither of both languages is perfect (for example, neither includes static typing), but their syntax is very different. JavaScript<\/strong> can be quite messy:<\/p>\n While Python<\/strong> is far easier to understand:<\/p>\n The fact that PyScript lets us use the Python syntax makes it the round winner without a doubt. Even though I\u2019m clearly biased towards Python, the fact that it\u2019s beginner-friendly and usually more concise and simple than JS makes it better in terms of usability.<\/p>\n The problem for PyScript is that JavaScript is already deeply integrated into browsers, making it more practical. Despite this, PyScript wins the round making it 2-1.<\/p>\n One more round to go\u2026<\/p>\n JavaScript has countless frameworks like React, Vue, and Angular, making it a powerhouse for building dynamic web applications. Its libraries are specifically optimized for the web, providing tools for everything from UI components to complex animations.<\/p>\n On the other hand, PyScript benefits from Python\u2019s vast ecosystem of scientific computing and data science libraries, such as NumPy, Pandas, and Matplotlib. While these tools are excellent for Data Visualization<\/a> and analysis, they aren\u2019t optimized for frontend web development. Additionally, PyScript requires workarounds to interact with the DOM, which JavaScript handles natively and efficiently.<\/p>\n While PyScript is an exciting tool for embedding Python into web applications, it\u2019s still in its early stages. JavaScript<\/a> remains the more practical choice for general web development, whereas PyScript shines in scenarios where Python\u2019s computational power is needed within the browser.<\/p>\n Here\u2019s a table summarizing some of the key components\u00a0<\/p>\nRound 1: What Are They?<\/h2>\n
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Round 2: Performance Battle<\/h2>\n
JavaScript<\/h3>\n
<button onclick=\"increment()\">Click Me<\/button>\n<p id=\"count\">0<\/p>\n<script>\n let count = 0;\n function increment() {\n count++;\n document.getElementById(\"count\").innerText = count;\n }\n<\/script>\n<\/code><\/pre>\nPyScript<\/h3>\n
<py-script>\nfrom pyscript import display\ncount = 0\n\ndef increment():\n global count\n count += 1\n display(count, target=\"count\")\n<\/py-script>\n<button py-click=\"increment()\">Click Me<\/button>\n<p id=\"count\">0<\/p><\/code><\/pre>\n\n
Round 3: Ease of Use & Readability<\/h2>\n
const numbers = [1, 2, 3];\nconst doubled = numbers.map(num => num * 2);<\/code><\/pre>\nnumbers = [1, 2, 3]\ndoubled = [num * 2 for num in numbers]<\/code><\/pre>\nRound 4: Ecosystem & Libraries<\/h2>\n