New features, bug fixes and housekeeping

PyTorch-Ignite 0.4.11 - Release Notes

New Features

Engine and Events

• Added before and after events filters (#2727)
• Can mix every and before/after event filters (#2860)
• once event filter can accept a sequence of int (#2858)

# "once" event filter
@engine.on(Events.ITERATION_STARTED(once=[50, 60]))
def call_once(engine):
    # do something on 50th and 60th iterations

# "before" and "after" event filter
@engine.on(Events.EPOCH_STARTED(after=10, before=30))
def call_after_and_before(engine):
    # do something in 11 to 29 epoch

# Mixing "every" and "before" / "after" event filters
@engine.on(Events.EPOCH_STARTED(every=5, after=8, before=25))
def call_after_and_before_every(engine):
    # do something on 9, 14, 19, 24 epochs

• Improved deterministic engine (#2756)
• Grad accumulation should not effect value of loss (#2737)
• Added model_transform in create supervised trainer (#2848)

Distributed module

• Updated idist.all_gather to take group arg (#2715)
• Updated idist.all_reduce to take group arg (#2712)
• Added idist.new_group method (#2711)

Metrics and handlers

• Updated LRFinder to have more than one parameter (#2704)
• Added get_param method to ParamGroupScheduler (#2720)
• Updated Polyaxon_logger (#2776)
• Dropped TrainsLoger and TrainsSaver also removed the BC code (#2742)
• Refactored PSNR and SSIM (#2797)
• [BC-breaking] Aligned SSIM output with PSNR output, both give tensors (#2794)
• Added distributed support to RocCurve (#2802)
• Refactored EpochMetric and made it idempotent (#2800)

Bug fixes

• Fixed device issue with metric tests SSIM, updated PSNR (#2796)
• Fixed LRScheduler issue and fixed CI (#2780)
• Fixed the code and now raise ModuleNotFoundError instead of RuntimeError (#2750)
• Fixed sync_all_reduce to cover update->compute->update case (#2803)

Housekeeping (docs, CI, examples, tests, etc)

• #2875, #2872, #2871, #2869, #2868, #2867, #2866, #2864, #2863, #2854, #2852, #2840, #2849, #2844, #2839, #2838, #2835, #2826, #2822, #2820, #2807, #2805, #2795, #2788, #2787, #2798, #2793, #2790, #2786, #2778, #2777, #2765, #2760, #2759, #2757, #2751, #2750, #2748, #2741, #2739, #2736, #2730, #2729, #2726, #2724, #2722, #2721, #2719, #2718, #2717, #2706, #2705, #2701, #2432

• Drop python 3.7 from CI (#2836)

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):

@DeepC004, @JakubDz2208, @Moh-Yakoub, @RishiKumarRay, @abhi-glitchhg, @crj1998, @guptaaryan16, @louis-she, @pacificdragon, @puhuk, @sadra-barikbin, @sallycaoyu, @soma2000-lang, @theory-in-progress, @vfdev-5, @ydcjeff

New Contributors

• @JakubDz2208 made their first contribution in #2704
• @soma2000-lang made their first contribution in #2742
• @guptaaryan16 made their first contribution in #2786
• @RishiKumarRay made their first contribution in #2790
• @crj1998 made their first contribution in #2794
• @abhi-glitchhg made their first contribution in #2835
• @sallycaoyu made their first contribution in #2849
• @DeepC004 made their first contribution in #2858
• @pacificdragon made their first contribution in #2863