Merge remote-tracking branch 'github/main' into op_constraints

Author: TrevorBergeron

bigframes/dataframe.py

@@ -306,6 +306,11 @@ def empty(self) -> bool:
     def values(self) -> numpy.ndarray:
         return self.to_numpy()
 
+    @property
+    def bqclient(self) -> bigframes.Session:
+        """BigQuery REST API Client the DataFrame uses for operations."""
+        return self._session.bqclient
+
     @property
     def _session(self) -> bigframes.Session:
         return self._get_block().expr.session

bigframes/ml/compose.py

@@ -23,7 +23,6 @@
 
 import bigframes_vendored.sklearn.compose._column_transformer
 
-from bigframes import constants
 from bigframes.core import log_adapter
 from bigframes.ml import base, core, globals, preprocessing, utils
 import bigframes.pandas as bpd
@@ -77,7 +76,6 @@ def transformers_(
             ]
         ] = []
 
-        column_set: set[str] = set()
         for entry in self.transformers:
             name, transformer, column_or_columns = entry
             columns = (
@@ -87,10 +85,6 @@ def transformers_(
             )
 
             for column in columns:
-                if column in column_set:
-                    raise NotImplementedError(
-                        f"Chained transformers on the same column isn't supported. {constants.FEEDBACK_LINK}"
-                    )
                 result.append((name, transformer, column))
 
         return result

notebooks/dataframes/dataframe.ipynb

@@ -1,5 +1,27 @@
 {
  "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "eeec3428",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Copyright 2023 Google LLC\n",
+    "#\n",
+    "# Licensed under the Apache License, Version 2.0 (the \"License\");\n",
+    "# you may not use this file except in compliance with the License.\n",
+    "# You may obtain a copy of the License at\n",
+    "#\n",
+    "#     https://www.apache.org/licenses/LICENSE-2.0\n",
+    "#\n",
+    "# Unless required by applicable law or agreed to in writing, software\n",
+    "# distributed under the License is distributed on an \"AS IS\" BASIS,\n",
+    "# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n",
+    "# See the License for the specific language governing permissions and\n",
+    "# limitations under the License."
+   ]
+  },
   {
    "attachments": {},
    "cell_type": "markdown",