def apply(self, sample: Sample) -> Optional[Sample]:
# Apply the complete list of data processors
# Non valid samples return None
if sample.meta is None:
sample = sample.new_meta({})
if not self.is_valid_sample(sample):
return None
for p in self.processors:
sample = p(sample)
if not self.is_valid_sample(sample):
return None
return sample
def apply_on_sample(self, sample: Sample) -> Sample:
if sample.meta is None:
sample = sample.new_meta({})
return self.apply(sample.copy())
