def __repr__(self):
statements = []
for metric in self.METRIC_NAMES:
value = getattr(self, metric)[-1]
if isinstance(value, list):
if len(value) == 0:
value = np.nan
else:
value = value[-1]
statements.append("{m}:{v}".format(m=metric, v=value))
return '\n'.join(statements)
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