PyTorch-Ignite 0.4.2 - Release Notes

Core

New Features and bug fixes

• Added SSIM metric (#1217)

• Added prebuilt Docker images (#1218)

• Added distributed support for EpochMetric and related metrics (#1229)

• Added required_output_keys public attribute (#1291)

• Pre-built docker images for computer vision and nlp tasks
  powered with Nvidia/Apex, Horovod, MS DeepSpeed (#1304 #1248 #1218 )

Handlers and utils

• Allow passing keyword arguments to save function on Checkpoint (#1245)

Distributed helper module

• Added support of Horovod (#1195)
• Added idist.broadcast (#1237)
• Added sync_bn option to idist.auto_model (#1265)

Contrib

New Features and bug fixes

• Added EpochOutputStore handler (#1226)
• Improved displayed tag for tqdm progress bar (#1279)
• Fixed bug with ParamGroupScheduler with schedulers based on different optimizers (#1274)

And a lot of house-keeping Pre-September Hacktoberfest contributions

• Added initial Mypy check at CI step (#1296)
• Fixed typo in docs (concepts) (#1295)
• Fixed link to pytorch documents (#1294)
• Removed prints from tests (#1292)
• Downgraded tqdm version to stabilize the CI (#1293)

Acknowledgments

🎉 Thanks to our community and all our contributors for the issues, PRs and 🌟 ⭐️ 🌟 !
💯 We really appreciate your implication into the project (in alphabetical order):

@M3L6H, @Tawishi, @WrRan, @ZhiliangWu, @benji011, @fco-dv, @kamahori, @kenjihiraoka, @kilsenp, @n2cholas, @nzare, @sdesrozis, @theodumont, @vfdev-5, @ydcjeff,