feat: support pd.cut() for array-like type

Author: chelsea-lin

bigframes/core/reshape/tile.py

@@ -20,6 +20,7 @@
 import bigframes_vendored.pandas.core.reshape.tile as vendored_pandas_tile
 import pandas as pd
 
+import bigframes
 import bigframes.constants
 import bigframes.core.expression as ex
 import bigframes.core.ordering as order
@@ -60,9 +61,12 @@ def cut(
             f"but found {type(list(labels)[0])}. {constants.FEEDBACK_LINK}"
         )
 
-    if x.size == 0:
+    if len(x) == 0:
         raise ValueError("Cannot cut empty array.")
 
+    if not isinstance(x, bigframes.series.Series):
+        x = bigframes.series.Series(x)
+
     if isinstance(bins, int):
         if bins <= 0:
             raise ValueError("`bins` should be a positive integer.")

tests/system/small/test_pandas.py

@@ -520,6 +520,18 @@ def _convert_pandas_category(pd_s: pd.Series):
     )
 
 
+def test_cut_for_array():
+    """Avoid regressions for internal issue 329866195"""
+    sc=[30,80,40,90,60,45,95,75,55,100,65,85]
+    x=[20,40,60,80,100]
+
+    pd_result = pd.cut(sc, x)
+    bf_result = bpd.cut(sc, x)
+
+    pd_result = _convert_pandas_category(pd.Series(pd_result))
+    pd.testing.assert_series_equal(bf_result.to_pandas(), pd_result)
+
+
 @pytest.mark.parametrize(
     ("right", "labels"),
     [

third_party/bigframes_vendored/pandas/core/reshape/tile.py

@@ -12,7 +12,7 @@
 
 
 def cut(
-    x: series.Series,
+    x,
     bins: typing.Union[
         int,
         pd.IntervalIndex,
@@ -113,7 +113,7 @@ def cut(
         dtype: struct<left_inclusive: int64, right_exclusive: int64>[pyarrow]
 
     Args:
-        x (bigframes.pandas.Series):
+        x (array-like):
             The input Series to be binned. Must be 1-dimensional.
         bins (int, pd.IntervalIndex, Iterable):
             The criteria to bin by.