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from typing import Any, Callable, Optional
from ignite.engine import Engine
from ignite.engine.events import Events
def global_step_from_engine(engine: Engine, custom_event_name: Optional[Events] = None) -> Callable:
"""Helper method to setup `global_step_transform` function using another engine.
This can be helpful for logging trainer epoch/iteration while output handler is attached to an evaluator.
Args:
engine: engine which state is used to provide the global step
custom_event_name: registered event name. Optional argument, event name to use.
Returns:
global step based on provided engine
"""
def wrapper(_: Any, event_name: Events) -> int:
if custom_event_name is not None:
event_name = custom_event_name
return engine.state.get_event_attrib_value(event_name)
return wrapper
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