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Using a general-purpose framework such as FastAPI involves writing a lot of boilerplate code just to get your API endpoint up and running. If deploying a model for a demo is the only thing you are interested in and you do not mind losing some flexibility, you might want to use a specialized serving framework instead. One example is BentoML, which will allow you to get an optimized serving endpoint for your model up and running much faster and with less overhead than a generic web framework. Framework-specific serving solutions such as Tensorflow Serving and TorchServe typically offer optimized performance but can only be used to serve models trained using Tensorflow or PyTorch, respectively.
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Front end development is where you will likely have to leave Python behind. While libraries such as Skulpt and Brython enable the use of Python in the browser, I highly recommend using Javascript as the very large community means that tutorials are numerous, and it will be much easier to seek help if needed. The two most popular libraries to build user interfaces in Javascript are React (tutorial for ML demo) and Vue.js (tutorial for ML demo). Using a general-purpose framework will give the flexibility needed to tailor the UI to your exact requirements.
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So what if you want something almost as flexible as what is possible with the full-stack approach, but without the development requirements? Well, you are in luck because the past few years have seen the emergence of Python libraries that allow the creation of impressively interactive demos with only a few lines of code. In this article, we are going to focus on two of the most promising libraries: Gradio and Streamlit. There are notable differences between the two that will be explored below, but the high level idea is the same: eliminate most of the painful back and front end work outlined in the full-stack section, albeit at the cost of some flexibility.
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Front end development is where you will likely have to leave Python behind. While libraries such as Skulpt and Brython enable the use of Python in the browser, I highly recommend using Javascript as the very large community means that tutorials are numerous, and it will be much easier to seek help if needed. The two most popular libraries to build user interfaces in Javascript are React (tutorial for ML demo) and Vue.js (tutorial for ML demo). Using a general-purpose framework will give the flexibility needed to tailor the UI to your exact requirements.
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Deploying apps developed using either Gradio or Streamlit got a whole lot easier when Hugging Face added Spaces to their ecosystem of ML products and tools. Spaces are similar to Github Pages -- code is committed to a repository, and the app is automatically build and served. When creating a space, you pick between Streamlit, Gradio, and Static (which more or less replicates Github Pages' static website hosting capabilities). The Space is then automatically setup to accommodate your library of choice. Useful features such as versioning and the ability for users to like a space make it a great experience for the deployment of a public machine learning demo.
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The goal of the back end is to act as a wrapper for a model so that it can be queried via HTTP requests from the front end, something referred to as model serving. In order to do so, one would typically use a web framework. For a long time, Flask was the standard for Python-based web frameworks, and is indeed still very popular. However, FastaAPI is quickly becoming the new favorite, thanks to impressive performance and native support for asynchronous operations. This article is a good starting point to understand how a simple model can be deployed using FastAPI, while this tutorial provides a complete overview of all the steps required to serve a PyTorch model with GPU support.
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The goal of the back end is to act as a wrapper for a model so that it can be queried via HTTP requests from the front end, something referred to as model serving. In order to do so, one would typically use a web framework. For a long time, Flask was the standard for Python-based web frameworks, and is indeed still very popular. However, FastaAPI is quickly becoming the new favorite, thanks to impressive performance and native support for asynchronous operations. This article is a good starting point to understand how a simple model can be deployed using FastAPI, while this tutorial provides a complete overview of all the steps required to serve a PyTorch model with GPU support.
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