<s> import io <EOL> from sklearn . metrics import auc , roc_curve <EOL> from tabulate import tabulate <EOL> from . test_statistic import ClassifierStatistic , TestStatistic <EOL> class roc ( ClassifierStatistic ) : <EOL> """<STR_LIT>""" <EOL> @ classmethod <EOL> def _single_class_stat ( cls , scores , labels , comparison_label ) : <EOL> y_proba = [ s [ '<STR_LIT>' ] [ comparison_label ] for s in scores ] <EOL> y_true = [ l == comparison_label for l in labels ] <EOL> fprs , tprs , thresholds = roc_curve ( y_true , y_proba ) <EOL> return { <EOL> '<STR_LIT>' : auc ( fprs , tprs ) , <EOL> '<STR_LIT>' : fprs , <EOL> '<STR_LIT>' : tprs , <EOL> '<STR_LIT>' : thresholds <EOL> } <EOL> @ classmethod <EOL> def format ( cls , stats , format = "<STR_LIT:str>" ) : <EOL> if format == "<STR_LIT:str>" : <EOL> return cls . format_str ( stats ) <EOL> elif format == "<STR_LIT>" : <EOL> if '<STR_LIT>' in stats : <EOL> return { <EOL> '<STR_LIT>' : round ( stats [ '<STR_LIT>' ] , <NUM_LIT:3> ) <EOL> } <EOL> else : <EOL> return { k : round ( ss [ '<STR_LIT>' ] , <NUM_LIT:3> ) for k , ss in stats . items ( ) } <EOL> else : <EOL> raise TypeError ( "<STR_LIT>" <EOL> . format ( format , cls . __name__ ) ) <EOL> @ classmethod <EOL> def format_str ( cls , stats ) : <EOL> formatted = io . StringIO ( ) <EOL> if '<STR_LIT>' in stats and '<STR_LIT>' in stats : <EOL> formatted . write ( "<STR_LIT>" . format ( round ( stats [ '<STR_LIT>' ] , <NUM_LIT:3> ) ) ) <EOL> else : <EOL> formatted . write ( "<STR_LIT>" ) <EOL> table_data = [ ( repr ( label ) , round ( stats [ label ] [ '<STR_LIT>' ] , <NUM_LIT:3> ) ) <EOL> for label in sorted ( stats . keys ( ) ) ] <EOL> formatted . write ( "<STR_LIT>" . join ( [ "<STR_LIT:\t>" + line + "<STR_LIT:\n>" for line in <EOL> tabulate ( table_data ) . split ( "<STR_LIT:\n>" ) ] ) ) <EOL> return formatted . getvalue ( ) <EOL> TestStatistic . register ( "<STR_LIT>" , roc ) </s>
