mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-09 08:31:26 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 13

Backed out changeset af29d89083b3 (closes #25548) (closes #27498)

Browse source
This commit is contained in:
Benjamin Peterson 2016-07-13 21:13:29 -07:00
parent fb4f8257bf
commit ab078e9ed1
20 changed files with 92 additions and 105 deletions
Download patch file Download diff file Expand all files Collapse all files

8
Lib/statistics.py
View file

@ -131,23 +131,23 @@ def _sum(data, start=0):
--------
>>> _sum([3, 2.25, 4.5, -0.5, 1.0], 0.75)
(<class 'float' ...>, Fraction(11, 1), 5)
(<class 'float'>, Fraction(11, 1), 5)
Some sources of round-off error will be avoided:
>>> _sum([1e50, 1, -1e50] * 1000) # Built-in sum returns zero.
(<class 'float' ...>, Fraction(1000, 1), 3000)
(<class 'float'>, Fraction(1000, 1), 3000)
Fractions and Decimals are also supported:
>>> from fractions import Fraction as F
>>> _sum([F(2, 3), F(7, 5), F(1, 4), F(5, 6)])
(<class 'fractions.Fraction' ...>, Fraction(63, 20), 4)
(<class 'fractions.Fraction'>, Fraction(63, 20), 4)
>>> from decimal import Decimal as D
>>> data = [D("0.1375"), D("0.2108"), D("0.3061"), D("0.0419")]
>>> _sum(data)
(<class 'decimal.Decimal' ...>, Fraction(6963, 10000), 4)
(<class 'decimal.Decimal'>, Fraction(6963, 10000), 4)
Mixed types are currently treated as an error, except that int is
allowed.