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| author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2021-12-01 01:25:57 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-12-01 01:25:57 (GMT) |
| commit | 0aa0bd056349f73de9577ccc38560c1d01864d51 (patch) | |
| tree | b12f036967e471c117f3fcb54fc6ae0a55ddc02c /Lib/statistics.py | |
| parent | a39f46afdead515e7ac3722464b5ee8d7b0b2c9b (diff) | |
| download | cpython-0aa0bd056349f73de9577ccc38560c1d01864d51.zip cpython-0aa0bd056349f73de9577ccc38560c1d01864d51.tar.gz cpython-0aa0bd056349f73de9577ccc38560c1d01864d51.tar.bz2 | |
bpo-45876: Have stdev() also use decimal specific square root. (GH-29869)
Diffstat (limited to 'Lib/statistics.py')
| -rw-r--r-- | Lib/statistics.py | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Lib/statistics.py b/Lib/statistics.py index 9f1efa2..ff19ce9 100644 --- a/Lib/statistics.py +++ b/Lib/statistics.py @@ -920,9 +920,8 @@ def stdev(data, xbar=None): raise StatisticsError('stdev requires at least two data points') T, ss = _ss(data, xbar) mss = ss / (n - 1) - if hasattr(T, 'sqrt'): - var = _convert(mss, T) - return var.sqrt() + if issubclass(T, Decimal): + return _decimal_sqrt_of_frac(mss.numerator, mss.denominator) return _float_sqrt_of_frac(mss.numerator, mss.denominator) |