forked from googleapis/python-bigquery-dataframes
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathexplode.py
More file actions
36 lines (29 loc) · 1.22 KB
/
explode.py
File metadata and controls
36 lines (29 loc) · 1.22 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
# Copyright 2023 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utility functions for implementing 'explode' functions."""
from typing import cast, Sequence, Union
import bigframes.core.blocks as blocks
import bigframes.core.utils as utils
def check_column(
column: Union[blocks.Label, Sequence[blocks.Label]],
) -> Sequence[blocks.Label]:
if not utils.is_list_like(column):
column_labels = cast(Sequence[blocks.Label], (column,))
else:
column_labels = cast(Sequence[blocks.Label], tuple(column))
if not column_labels:
raise ValueError("column must be nonempty")
if len(column_labels) > len(set(column_labels)):
raise ValueError("column must be unique")
return column_labels