class composer.Logger(state, destinations=None)[source]#

An interface to record training data.

The Trainer, instances of Callback, and instances of Algorithm invoke the logger to record data such as the epoch, training loss, and custom metrics as provided by individual callbacks and algorithms. This class does not store any data itself; instead, it routes all data to the destinations. Each destination (e.g. the FileLogger, InMemoryLogger) is responsible for storing the data itself (e.g. writing it to a file or storing it in memory).

  • state (State) โ€“ The training state.

  • destinations (LoggerDestination | Sequence[LoggerDestination], optional) โ€“ The logger destinations, to where logging data will be sent. (default: None)


A sequence of LoggerDestination to where logging calls will be sent.




Determines if the logger has a destination which supports uploading files.

Needed for checking if a model can be exported via this logger.


bool โ€“ Whether any of the destinations support uploading files.

upload_file(remote_file_name, file_path, *, overwrite=False)[source]#

Upload file_path as a file named remote_file_name.

Both file_path and remote_file_name can be specified as format strings. See format_name_with_dist() for more information.

See also

Uploading Files for notes for file uploading.

  • remote_file_name (str) โ€“ A format string for the name of the file.

  • file_path (str | Path) โ€“ A format string for the file path.

  • overwrite (bool, optional) โ€“ Whether to overwrite an existing file with the same remote_file_name. (default: False)