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Stats
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Stats provides tools which can be used for data collection and analysis.
Usage might look like this::
#!/usr/bin/env python
from stats import ReservoirSample
print 'Building a sample of some larger data set'
s = ReservoirSample(100)
for value in some_really_large_list
s.add(value)
print 'Printing sample'
for v in s:
print v