def get_subsample(self, sample_name, subsample_name):
s = self.get_sample(sample_name)<EOL>return s.get_subsample(subsample_name)<EOL>
From indicated sample get particular subsample.

:param str sample_name: Name of Sample from which to get subsample
:param str subsample_name: Name of Subsample to get
:return peppy.Subsample: The Subsample of requested name from indicated
    sample matching given name