tensorboard

Source code: tianshou/utils/logger/tensorboard.py

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class BasicLogger(*args: Any, **kwargs: Any)

BasicLogger has changed its name to TensorboardLogger in #427.

This class is for compatibility.

class TensorboardLogger(writer: SummaryWriter, train_interval: int = 1000, test_interval: int = 1, update_interval: int = 1000, info_interval: int = 1, save_interval: int = 1, write_flush: bool = True)

A logger that relies on tensorboard SummaryWriter by default to visualize and log statistics.

Parameters:

• writer (SummaryWriter) – the writer to log data.

• train_interval – the log interval in log_train_data(). Default to 1000.

• test_interval – the log interval in log_test_data(). Default to 1.

• update_interval – the log interval in log_update_data(). Default to 1000.

• info_interval – the log interval in log_info_data(). Default to 1.

• save_interval – the save interval in save_data(). Default to 1 (save at the end of each epoch).

• write_flush – whether to flush tensorboard result after each add_scalar operation. Default to True.

restore_data() → tuple[int, int, int]

Return the metadata from existing log.

If it finds nothing or an error occurs during the recover process, it will return the default parameters.

Returns:

epoch, env_step, gradient_step.

save_data(epoch: int, env_step: int, gradient_step: int, save_checkpoint_fn: Callable[[int, int, int], str] | None = None) → None

Use writer to log metadata when calling save_checkpoint_fn in trainer.

Parameters:

• epoch – the epoch in trainer.

• env_step – the env_step in trainer.

• gradient_step – the gradient_step in trainer.

• save_checkpoint_fn (function) – a hook defined by user, see trainer documentation for detail.

write(step_type: str, step: int, data: dict[str, int | Number | number | ndarray | float]) → None

Specify how the writer is used to log data.

Parameters:

• step_type (str) – namespace which the data dict belongs to.

• step – stands for the ordinate of the data dict.

• data – the data to write with format {key: value}.