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fchollet's profile
François Chollet
François Chollet
François Chollet
Verified account
@fchollet

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François CholletVerified account

@fchollet

Deep learning @google. Creator of Keras. Author of 'Deep Learning with Python'. Opinions are my own.

United States
fchollet.com
Joined August 2009

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    François Chollet‏Verified account @fchollet 29 Jan 2019

    A tremendously useful explainer about symbolic APIs (Sequential + Functional API) and Model subclassing in TF 2.0, by @random_forests:https://medium.com/tensorflow/what-are-symbolic-and-imperative-apis-in-tensorflow-2-0-dfccecb01021 …

    12:49 PM - 29 Jan 2019
    • 122 Retweets
    • 372 Likes
    • Σ Abdul. Danny Amado 정현우 Joshua Leung Rajesh S (aiexplorations) 💉💉 milad bahrami Michele Lombardi Mike Dusenberry trylks
    3 replies 122 retweets 372 likes
      1. New conversation
      2. François Chollet‏Verified account @fchollet 29 Jan 2019

        Symbolic APIs are APIs to build graphs of layers. Their strong points are that: - They match how we think about our networks (NNs are always visualized as graphs of layers in textbooks & papers) - They run extensive static checks during model construction, like a compiler would

        1 reply 7 retweets 23 likes
        Show this thread
      3. François Chollet‏Verified account @fchollet 29 Jan 2019

        This gives you the guarantee that any model that you can build, will run. The only form of debugging you'd have to do at runtime would be convergence-related. The UX of these APIs is highly intuitive and productive

        1 reply 4 retweets 15 likes
        Show this thread
      4. François Chollet‏Verified account @fchollet 29 Jan 2019

        Meanwhile, the subclassing API has the look and feel of objected-oriented Numpy development. It's ideal if you're doing anything that cannot easily be expressed as a graph of layers, and you feel comfortable with software engineering best practices and large Python projects.

        1 reply 3 retweets 10 likes
        Show this thread
      5. François Chollet‏Verified account @fchollet 29 Jan 2019

        It will involve execution-time debugging, more code, and will expose a greater error surface, but at the same time it will give you greater flexibility to express unconventional architectures.

        1 reply 2 retweets 10 likes
        Show this thread
      6. François Chollet‏Verified account @fchollet 29 Jan 2019

        Importantly, in TF 2.0, both of these styles are available and are fully interoperable. You can mix and match models defined with either style. At the end of the day, everything is a Model! That way, you are free to pick the most appropriate API for the task at hand.

        1 reply 2 retweets 9 likes
        Show this thread
      7. François Chollet‏Verified account @fchollet 29 Jan 2019

        In general I expect ~90-95% of use cases to be covered by the Functional API. The Model subclassing API targets deep learning researchers specifically (about 5% of use cases).

        3 replies 4 retweets 19 likes
        Show this thread
      8. François Chollet‏Verified account @fchollet 29 Jan 2019

        I think it's great that we don't silo researchers and everyone else into completely separate frameworks. It's all one API, that enables a spectrum of workflows, from really easy (Sequential) to advanced (Functional) to fully flexible and hackable (Model subclassing)

        2 replies 5 retweets 36 likes
        Show this thread
      9. End of conversation
      1. New conversation
      2. Behrooz Azarkhalili‏ @Azarkhalili 30 Jan 2019
        Replying to @fchollet @random_forests

        Do your have any idea about the time of #TensorFlow 2 release?

        1 reply 0 retweets 1 like
      3. François Chollet‏Verified account @fchollet 30 Jan 2019
        Replying to @Azarkhalili @random_forests

        There will be an alpha release in spring. Meanwhile you try the TF 2.0 preview nightly build.

        1 reply 0 retweets 1 like
      4. Show replies
      1. New conversation
      2. lostinio‏ @lostinio 30 Jan 2019
        Replying to @fchollet @random_forests

        I was a fan of TF since 0.7 and now I like its probability package. But after trying PyTorch 1.0 I felt that it looks more consistent and intuitive. It seems for me that PyTorch's team has more clear vision what kind of tools ML developers need.

        1 reply 0 retweets 0 likes
      3. lostinio‏ @lostinio 30 Jan 2019
        Replying to @lostinio @fchollet @random_forests

        I use TF and PT, but now when I am going to implement something new from arxiv papers I subconsciously make "import torch" not tensorflow with its mess of eager modes or TF2.0 not yet ready.

        1 reply 0 retweets 0 likes
      4. Show replies

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