Code fragment metadata

hasIdentifier:	https://padme-analytics.de/pht/codeFragment/4b819c8e700ba108840d7d29600650487aa3e0a7f862188172777493b249b411
hasContent:	header = ( ",".join( [ "epoch", "station_name", "train_loss", "val_loss", "val_acc", "val_prec", "val_rec", "val_f1", "time", ] ) + "\n" )

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