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Diffstat (limited to 'python/pyspark/sql/dataframe.py')
| -rw-r--r-- | python/pyspark/sql/dataframe.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py index 29710acf54..3899890083 100644 --- a/python/pyspark/sql/dataframe.py +++ b/python/pyspark/sql/dataframe.py @@ -549,6 +549,11 @@ class DataFrame(object): def sample(self, withReplacement, fraction, seed=None): """Returns a sampled subset of this :class:`DataFrame`. + .. note:: + + This is not guaranteed to provide exactly the fraction specified of the total count + of the given :class:`DataFrame`. + >>> df.sample(False, 0.5, 42).count() 2 """ |