def mean_by(lst, f=lambda el: el):
return sum(map(f, lst), 0.0) / len(lst)mean_by([{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }], lambda p: p['n']) # 5.0
Last active
May 25, 2020 22:14
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Returns the average of a list, after mapping each element to a value using the provided function.
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