gh-110150: Fix base case handling in quantiles() (gh-110151)

1 files changed, 6 insertions, 1 deletions

diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst
index f3c1bf2..5c8ad3a 100644
--- a/Doc/library/statistics.rst
+++ b/Doc/library/statistics.rst
@@ -585,7 +585,7 @@ However, for reading convenience, most of the examples show sorted sequences.
 
    The *data* can be any iterable containing sample data.  For meaningful
    results, the number of data points in *data* should be larger than *n*.
-   Raises :exc:`StatisticsError` if there are not at least two data points.
+   Raises :exc:`StatisticsError` if there is not at least one data point.
 
    The cut points are linearly interpolated from the
    two nearest data points.  For example, if a cut point falls one-third
@@ -625,6 +625,11 @@ However, for reading convenience, most of the examples show sorted sequences.
 
    .. versionadded:: 3.8
 
+   .. versionchanged:: 3.13
+      No longer raises an exception for an input with only a single data point.
+      This allows quantile estimates to be built up one sample point
+      at a time becoming gradually more refined with each new data point.
+
 .. function:: covariance(x, y, /)
 
    Return the sample covariance of two inputs *x* and *y*. Covariance