23 lines
502 B
Python
23 lines
502 B
Python
from math import sqrt, isclose
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def mean(l):
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return sum(l)/len(l)
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def std(l):
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m = mean(l)
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diffs = [(x-m)**2 for x in l]
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return sqrt(sum(diffs)/len(diffs))
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def test_mean():
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l = [1.0, 2.0, 3.0, 4.0]
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expected = 2.5
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return isclose(mean(l), expected, abs_tol=0.001)
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def test_std():
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l = [1.0, 2.0, 3.0, 4.0]
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expected = 1.11803
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return isclose(std(l), expected, abs_tol=0.001)
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if __name__ == '__main__':
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print('mean:', test_mean())
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print('std:', test_std()) |