For example, the function for calculating standard deviation is written
`statistics.stdev` not `σ`.
What do you mean?
>>> from statistics import stdev as σ
>>> σ([5, 6, 4, 6, 3, 7])
1.4719601443879744
:-)
Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons. Intellectual property is
to the 21st century what the slave trade was to the 16th.