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tensorflow/tensorflow v2.21.0

2026-03-06 19:48 · ⭐ 19.6万 · GitHub Release 原文 ↗
#深度学习框架 #模型部署 #版本更新

tensorflow/tensorflow v2.21.0

TensorFlow 是一个开源的端到端机器学习平台，广泛用于构建和部署深度学习模型。它提供了从研究实验到生产部署的完整工具链，拥有庞大的社区和生态系统，是 AI 领域最活跃、最成熟的项目之一。

本次 v2.21.0 版本主要移除了对 Python 3.9 和 TensorBoard 的依赖，并在 tf.lite 和 tf.image 中增加了新的算子支持和类型支持。

▸ Release Notes 英文原文（6403 字符）
# Release 2.21.0 ## TensorFlow ### Breaking Changes * Support for Python 3.9 has been removed starting with TF 2.21. * The TensorBoard (TB) dependency has been removed starting with TF 2.21. ### Major Features and Improvements * `tf.lite` * Adds int8 and int16x8 support for SQRT operator. * Adds int16x8 support for EQUAL and NOT_EQUAL operators. * Adds support for int2 type. * Adds support for int2/int4 in tfl.cast . * Adds support for SRQ int2 in tfl.fully_connected. * Adds support for int4 in tfl.slice. * Adds support for uint4 type. * `tf.image` * Adds JPEG XL support in decode_image. ### Bug Fixes and Other Changes * `tf.data` * Adds `NoneTensorSpec` to the public API so that `None`s in `element_spec` can be identified via `isinstance(..., tf.NoneTensorSpec)`. ## Thanks to our Contributors This release contains contributions from many people at Google, as well as: Aaraviitkgp, Abhijeet, Abhinav Gunjal, Abhishek, Adam Paszke, Aditya Gupta, Aditya Jha, Aditya Sharma, Adrian Kuegel, Aiden Grossman, Akarsh, Akhil Goel, Alan Kelly, Aleksa Arsic, Aleksei, Aleksei Nurmukhametov, Alex, Alexander Belyaev, Alexander Grund, Alexander Lyashuk, Alexander Shaposhnikov, Alex Pivovarov, Aliia Khasanova, Alina Sbirlea, Allan Renucci, Amelia Thurdekoos, Amit Sabne, Andrei Ivanov, Andrew Dame, Andrey Portnoy, Anish Nair, Anlun Xu, Antonio Sanchez, anuj chincholikar, Anuj Chincholikar, Aravindh Balaji, aravindhbalaji1985, Arian Arfaian, Armin Felder, Artem Belevich, Ashish Rao, Ashitesh Singh, A. Unique TensorFlower, Bart Chrzaszcz, benediktjohannes, Benjamin Chetioui, Benjamin Kramer, Berkin Ilbeyi, Bhatu, Bhavani Subramanian, Bhupendra Dubey, Bill Varcho, Bixia Zheng, Blake Hechtman, Bodhi Silberling, BruceXinXin, Bryan Massoth, Buddh Prakash, Byungchul Kim, Ce Zheng, Changhui Lin, Chao, Charles Alaras, Chase Riley Roberts, Chenhao Jiang, Chris Ashton, Chris Jones, Chris Kennelly, Christian Sigg, Chuan He, Chunlei Niu, Chun-nien Chan, Chunyu Jin, Clive Verghese, Cong Liu, Corentin Kerisit, Daniel Chen, Daniel Kuts, Daniel Ng, Daniel Sosa, Daniel Suo, Danila Malyutin, David Dunleavy, David Majnemer, David Pizzuto, Deepika Rajani, deeptanshusekhri, dependabot[bot], Deqiang Chen, Derek Murray, Dillon Sharlet, Dimitar (Mitko) Asenov, Dimitris Vardoulakis, Dirk Hornung, DottsGit, Dragan Mladjenovic, Eetu Sjöblom, Elen Kalda, Emilio Cota, Emily Fertig, Eugene Zhulenev, Eusebio Durán Montaña, Evan Brown, Ezekiel Calubaquib, Faijul Amin, Felix Wang, Fengwu Yao, Fergus Henderson, Frederic Rechtenstein, Frederik Gossen, Gabriel Gerlero, Gagan Nagaraj, gaikwadrahul8, garry00107, gaurides, George Pawelczak, Georg Stefan Schmid, gns, Goran Flegar, Graham, Grant Jensen, Greg Olechwierowicz, Gregory Pataky, Grzegorz Gawryał, Gunhyun Park, guozhong.zhuang, Haibo Huang, Hana Joo, Hariprasad Ravishankar, Harsha H S, Harshit Monish, Henning Becker, Hittanshu, Hoeseong (Hayden) Kim, Hugo Mano, Hyeontaek Lim, Ibrahim Umit Akgun, ILCSFNO, Ilia Sergachev, Ilya Tikhonovskiy, Iman Hosseini, Ionel Gog, Isha Arkatkar, isharif168, Ivo Ristovski List, Jacques Pienaar, Jae H. Yoo, Jaeyoon Jung, Jake Harmon, James Hilliard, jameslovespancakes, James Spooner, Jane Liu, Jaroslav Sevcik, Jeff Parker, Jeffrey A. Dean, Jeremy Meredith, Jialei Chen, Jian Cai, Jian Li, Jie Luo, Jim Lin, Jing Pu, Jinliang Wei, Jiya Zhang, Joel Wee, Johannes Buchner, Johannes Reifferscheid, Johnny, Jorge Gorbe Moya, Joshua Lang, Joshua Wang, Joss Briody, jparkerh, Juanli Shen, Juhyun Lee, Jun Jiang, Junwhan Ahn, Kadir Barut, Kanglan Tang, Kanish Anand, Kanvi Khanna, Karlo Basioli, Ken Franko, Kevin Chen, Kevin Gleason, Kingston Mandisodza, Koki Ibukuro, Kostiantyn Liepieshov, Krishna Haridasan, Krishna Somani, Krzysztof Kosiński, Kuy Mainwaring, lambert, Larry Lansing, Lin Chai, Lord ε Rebel, Luke Baumann, Luke Hutton, madhavmadupu, Majid Dadashi, Mani Ananth, Manjunath Gaonkar, Marcello Maggioni, Marcin Radomski, Maria Lyubimtseva, Marissa Ikonomidis, Mark Daoust, Mason Chang, Matej Aleksandrov, Mateusz Sokół, Matthias Guenther, Matthias Kramm, Matt Hurd, Matt Kreileder, Maxime France-Pillois, Maxim Ermilov, Mehrdad Khani, Melissa Weber Mendonça, MERT-CKR, Michael Goldfarb, Michael Green, Michael Kuperstein, Michael Voznesensky, Michael Whittaker, Mihai Maruseac, Mikhail Goncharov, Ming-Xu Huang, Mircea Trofin, Misha Gutman, misterBart, mmakevic-amd, Mohamed AbdElmoneim, Mohamed Amine Zghal, Mohammadreza Heydary, Mohammed Anany, mraunak, Mudit Gokhale, Nayana Thorat, Nevi, nhatle, Nhat Le, Nihar0071, Nikhil, Nikita Putikhin, Niklas Vangerow, Nitin Srinivasan, Oleg Shyshkov, Olli Lupton, Om Thakkar, Pankaj Kanwar, Parker Schuh, Paul Ganssle, Pauline Sho, Pavithra Eswaramoorthy, Pedro Gonnet, pemeliya, Penporn Koanantakool, Perry Gibson, Peter Buchlovsky, Peter Gavin, Peter Hawkins, Pham Binh, Phani Paladugula, Philipp Hack, Praneeth Mandala, Praveen Batra, psinfinity, Qingwei Zhang, Quentin Khan, Quoc Truong, QZero, Rachel Han, Raffi Khatchadourian, Ram Rachum, RasheedAli-Shaik, Raviteja Gorijala, Reed Wanderman-Milne, Reilly Grant, Renjie Wu, Richard Levasseur, Robert David, Ryan M. Lefever, Sachin M, Sagun Bajra, Sai Ganesh Muthuraman, Saksham Singh Rathore, Sannidhya Chauhan, Sayan Saha, Sean Talts, Seher Ellis, Sergei Lebedev, Sergey Kozub, Sevin Fide Varoglu, Shahriar Rouf, Shanbin Ke, Shaogang Wang, Sharad Vikram, Shawn Lu, Siddhartha Menon, Siqiao Wu, skill, Smit Hinsu, snadampal, Sohaib Iftikhar, Soowon Jeong, spiao, Srijan Upadhyay, stevemcgregory, Subham Soni, Subhankar Shah, Swachhand Lokhande, Tai Ly, TensorFlower Gardener, Terry Heo, Terry Sun, Terry Tao, Theotime Combes, Thomas Joerg, Thomas Köppe, Tiago Quelhas, TJ Xu, Toli Yevtushenko, Tomás Longeri, Tom Hennigan, Tommy Chiang, Tom Natan, Tongfei Guo, Tori Baker, Uwe L. Korn, Vadym Matsishevskyi, Vamsi Manchala, Venkat6871, Victor Stone, Ville Vesilehto, Vitalii Dziuba, Vladimir Belitskiy, Vlad Sytchenko, Volodymyr Kysenko, Wai Hon Law, wan3x, Weiyi Wang, Will Froom, William S. Moses, wondertx, Xuefei Jiang, Yang Chen, Yash Katariya, Yasir Ashfaq, yasiribmcon, Yeou Chiou, Yicheng Luo, Yi Kong, Yimei Sun, Yin Zhang, Yuchen Yao, Yue Sheng, Yulia Baturina, Yunjie Xu, Yunlong Liu, Yun Peng, Yurii Topin, Zac Cranko, Zac Mustin, Zenong Zhang, Zeyu Wang, Zhanyong Wan, Zixuan Jiang, Ziyin Huang, Zviki Nozadze
▸ 主项目介绍 · tensorflow/tensorflow
▸ README 原文（同步于 2026-07-19 13:26）
<div align="center"> <img src="https://www.tensorflow.org/images/tf_logo_horizontal.png"> </div> [![Python](https://img.shields.io/pypi/pyversions/tensorflow.svg)](https://badge.fury.io/py/tensorflow) [![PyPI](https://badge.fury.io/py/tensorflow.svg)](https://badge.fury.io/py/tensorflow) [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4724125.svg)](https://doi.org/10.5281/zenodo.4724125) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1486/badge)](https://bestpractices.coreinfrastructure.org/projects/1486) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/tensorflow/tensorflow/badge)](https://securityscorecards.dev/viewer/?uri=github.com/tensorflow/tensorflow) [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/tensorflow.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:tensorflow) [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/tensorflow-py.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:tensorflow-py) [![OSSRank](https://shields.io/endpoint?url=https://ossrank.com/shield/44)](https://ossrank.com/p/44) [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md) **`Documentation`** | ------------------- | [![Documentation](https://img.shields.io/badge/api-reference-blue.svg)](https://www.tensorflow.org/api_docs/) | [TensorFlow](https://www.tensorflow.org/) is an end-to-end open source platform for machine learning. It has a comprehensive, flexible ecosystem of [tools](https://www.tensorflow.org/resources/tools), [libraries](https://www.tensorflow.org/resources/libraries-extensions), and [community](https://www.tensorflow.org/community) resources that lets researchers push the state-of-the-art in ML and developers easily build and deploy ML-powered applications. TensorFlow was originally developed by researchers and engineers working within the Machine Intelligence team at Google Brain to conduct research in machine learning and neural networks. However, the framework is versatile enough to be used in other areas as well. TensorFlow provides stable [Python](https://www.tensorflow.org/api_docs/python) and [C++](https://www.tensorflow.org/api_docs/cc) APIs, as well as a non-guaranteed backward compatible API for [other languages](https://www.tensorflow.org/api_docs). Keep up-to-date with release announcements and security updates by subscribing to [announce@tensorflow.org](https://groups.google.com/a/tensorflow.org/forum/#!forum/announce). See all the [mailing lists](https://www.tensorflow.org/community/forums). ## Install See the [TensorFlow install guide](https://www.tensorflow.org/install) for the [pip package](https://www.tensorflow.org/install/pip), to [enable GPU support](https://www.tensorflow.org/install/gpu), use a [Docker container](https://www.tensorflow.org/install/docker), and [build from source](https://www.tensorflow.org/install/source). To install the current release, which includes support for [CUDA-enabled GPU cards](https://www.tensorflow.org/install/gpu) *(Ubuntu and Windows)*: ``` pip install tensorflow ``` Other devices (DirectX and MacOS-metal) are supported using [Device Plugins](https://www.tensorflow.org/install/gpu_plugins#available_devices). A smaller CPU-only TensorFlow package is also available: ``` pip install tensorflow-cpu ``` To update TensorFlow to the latest version, add the `--upgrade` flag to the commands above. *Nightly binaries are available for testing using the [tf-nightly](https://pypi.python.org/pypi/tf-nightly) and [tf-nightly-cpu](https://pypi.python.org/pypi/tf-nightly-cpu) packages on PyPI.* #### *Try your first TensorFlow program* ```shell $ python ``` ```python >>> import tensorflow as tf >>> tf.add(1, 2).numpy() 3 >>> hello = tf.constant('Hello, TensorFlow!') >>> hello.numpy() b'Hello, TensorFlow!' ``` For more examples, see the [TensorFlow Tutorials](https://www.tensorflow.org/tutorials/). ## Contribution guidelines **If you want to contribute to TensorFlow, be sure to review the [Contribution Guidelines](CONTRIBUTING.md). This project adheres to TensorFlow's [Code of Conduct](CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code.** **We use [GitHub Issues](https://github.com/tensorflow/tensorflow/issues) for tracking requests and bugs, please see [TensorFlow Forum](https://discuss.tensorflow.org/) for general questions and discussion, and please direct specific questions to [Stack Overflow](https://stackoverflow.com/questions/tagged/tensorflow).** The TensorFlow project strives to abide by generally accepted best practices in open-source software development. ## Patching guidelines Follow these steps to patch a specific version of TensorFlow, for example, to apply fixes to bugs or security vulnerabilities: * Clone the TensorFlow repository and switch to the appropriate branch for your desired version—for example, `r2.8` for version 2.8. * Apply the desired changes (i.e., cherry-pick them) and resolve any code conflicts. * Run TensorFlow tests and ensure they pass. * [Build](https://www.tensorflow.org/install/source) the TensorFlow pip package from source. ## Continuous build status You can find more community-supported platforms and configurations in the [TensorFlow SIG Build Community Builds Table](https://github.com/tensorflow/build#community-supported-tensorflow-builds). ### Official Builds Build Type | Status | Artifacts ----------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- **Linux CPU** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-cc.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-cc.html) | [PyPI](https://pypi.org/project/tf-nightly/) **Linux GPU** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-gpu-py3.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-gpu-py3.html) | [PyPI](https://pypi.org/project/tf-nightly-gpu/) **Linux XLA** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-xla.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/ubuntu-xla.html) | TBA **macOS** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/macos-py2-cc.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/macos-py2-cc.html) | [PyPI](https://pypi.org/project/tf-nightly/) **Windows CPU** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/windows-cpu.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/windows-cpu.html) | [PyPI](https://pypi.org/project/tf-nightly/) **Windows GPU** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/windows-gpu.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/windows-gpu.html) | [PyPI](https://pypi.org/project/tf-nightly-gpu/) **Android** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/android.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/android.html) | [Download](https://bintray.com/google/tensorflow/tensorflow/_latestVersion) **Raspberry Pi 0 and 1** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/rpi01-py3.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/rpi01-py3.html) | [Py3](https://storage.googleapis.com/tensorflow-nightly/tensorflow-1.10.0-cp34-none-linux_armv6l.whl) **Raspberry Pi 2 and 3** | [![Status](https://storage.googleapis.com/tensorflow-kokoro-build-badges/rpi23-py3.svg)](https://storage.googleapis.com/tensorflow-kokoro-build-badges/rpi23-py3.html) | [Py3](https://storage.googleapis.com/tensorflow-nightly/tensorflow-1.10.0-cp34-none-linux_armv7l.whl) ## Resources * [TensorFlow.org](https://www.tensorflow.org) * [TensorFlow Tutorials](https://www.tensorflow.org/tutorials/) * [TensorFlow Official Models](https://github.com/tensorflow/models/tree/master/official) * [TensorFlow Examples](https://github.com/tensorflow/examples) * [TensorFlow Codelabs](https://codelabs.developers.google.com/?cat=TensorFlow) * [TensorFlow Blog](https://blog.tensorflow.org) * [Learn ML with TensorFlow](https://www.tensorflow.org/resources/learn-ml) * [TensorFlow Twitter](https://twitter.com/tensorflow) * [TensorFlow YouTube](https://www.youtube.com/channel/UC0rqucBdTuFTjJiefW5t-IQ) * [TensorFlow model optimization roadmap](https://www.tensorflow.org/model_optimization/guide/roadmap) * [TensorFlow White Papers](https://www.tensorflow.org/about/bib) * [TensorBoard Visualization Toolkit](https://github.com/tensorflow/tensorboard) * [TensorFlow Code Search](https://cs.opensource.google/tensorflow/tensorflow) Learn more about the [TensorFlow Community](https://www.tensorflow.org/community) and how to [Contribute](https://www.tensorflow.org/community/contribute). ## Courses * [Coursera](https://www.coursera.org/search?query=TensorFlow) * [Udacity](https://www.udacity.com/courses/all?search=TensorFlow) * [Edx](https://www.edx.org/search?q=TensorFlow) ## License [Apache License 2.0](LICENSE)