Bump catalyst[cv] from 20.3 to 20.3.3 in /requirements

[dependabot-preview[bot]]

Bumps catalyst[cv] from 20.3 to 20.3.3.

Release notes

Sourced from catalyst[cv]'s releases.

Catalyst 20.03.1

tl;dr

We finally organise Experiment-Runner-State-Callback as it should be. We also have great documentation update!

Core

1. Experiment - an abstraction that contains information about the experiment – a model, a criterion, an optimizer, a scheduler, and their hyperparameters. It also contains information about the data and transformations used. In general, the Experiment knows what you would like to run.

2. Runner - a class that knows how to run an experiment. It contains all the logic of how to run the experiment, stages, epoch and batches.

3. State - some intermediate storage between Experiment and Runner that saves the current state of the Experiments – model, criterion, optimizer, schedulers, metrics, loaders, callbacks, etc

4. Callback - a powerful abstraction that lets you customize your experiment run logic. To give users maximum flexibility and extensibility we allow callback execution anywhere in the training loop

 on_stage_start
     on_epoch_start
        on_loader_start
            on_batch_start
            # ... 
        on_batch_end
     on_epoch_end
 on_stage_end
on_exception

How to combine them together?

First of all - just read the docs for State, Experiment, Runner and Callback abstractions. Long story short, State just saves everything during experiment and passes to every Callback in Experiment through Runner.run_event. For example, usual case, for some custom metric implementation, all you need to do is

from catalyst.dl import Callback, State
class MyPureMetric(Callback):
def on_batch_end(self, state: State):
"""To store batch-based metrics"""
state.batch_metrics[{metric_name}] = metric_value
def on_loader_end(self, state: State):
"""To store loader-based metrics"""
state.loader_metrics[{metric_name}] = metric_value
def on_epoch_end(self, state: State):
"""To store epoch-based metrics"""
state.epoch_metrics[{metric_name}] = metric_value

... (truncated)

Commits

• eb15269 Docs/internal methods fix (#718)
• abfbda7 Core/design (#715)
• f41b380 Fix wandb wrong step problem (Fix #684) (#685)
• 1f772f9 ReduceLROnPlateau fix, logging and acrhitecture improvements (#714)
• b9fefc6 Catalyst.RL to extra repo (#709)
• bbb89a3 Fix to NeptuneLogger (#706)
• c2d87e2 Remove version from requirements.txt (#708)
• fa28e3b Refactoring of Runner Events (#672)
• 9657ab2 20.03.1 version (#707)
• 23bc131 Update docs to Catalyst Sphinx Theme (#704)
• Additional commits viewable in compare view

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