-
Notifications
You must be signed in to change notification settings - Fork 4
Expand file tree
/
Copy pathsample_cel_ext.py
More file actions
62 lines (57 loc) · 2.09 KB
/
Copy pathsample_cel_ext.py
File metadata and controls
62 lines (57 loc) · 2.09 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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
# Copyright 2025 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
#
# https://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.
"""A sample CEL extension implemented entirely in Python."""
import py_cel as cel
class SampleCelExtension(cel.CelExtension):
"""A sample class for a CEL extension."""
def __init__(self):
super().__init__(
"sample_cel_extension",
functions=[
cel.FunctionDecl(
"translate",
[
cel.Overload(
"translate_inst",
return_type=cel.Type.STRING,
parameters=[
cel.Type.STRING,
cel.Type.STRING,
cel.Type.STRING,
],
is_member=True,
impl=self.translate,
)
],
),
cel.FunctionDecl(
"translate_late",
[
cel.Overload(
"late_bound_translation",
return_type=cel.Type.STRING,
parameters=[cel.Type.STRING],
is_member=False,
# Note: no impl provided here.
)
],
),
],
)
def translate(self, text: str, from_lang: str, to_lang: str) -> str:
if from_lang != "en" or to_lang != "es":
raise ValueError("We can only translate from 'en' to 'es'")
if text != "Hello, world!":
raise ValueError("Come on, this is just 'Hello, world!'")
return "¡Hola Mundo!"