docstring for ParquetFile updated (#877)

* docstring for ParquetFile updated pandas_nullable=False only takes effect when pandas metadata is absent in the original file. * docstring for ParquetFile updated pandas_nullable=False only takes effect when pandas metadata is absent in the original file.
dask · Aug 5, 2023 · d83c555 · d83c555
1 parent 574b061
commit d83c555
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/fastparquet/api.py b/fastparquet/api.py
@@ -57,7 +57,8 @@ class ParquetFile(object):
     pandas_nulls: bool (True)
         If True, columns that are int or bool in parquet, but have nulls, will become
         pandas nullale types (Uint, Int, boolean). If False (the only behaviour
-        prior to v0.7.0), both kinds will be cast to float, and nulls will be NaN.
+        prior to v0.7.0), both kinds will be cast to float, and nulls will be NaN
+        unless pandas metadata indicates that the original datatypes were nullable.
         Pandas nullable types were introduces in v1.0.0, but were still marked as
         experimental in v1.3.0.