我一直在努力让 Google Assistant 在我的 Raspberry Pi 3 上工作。它正在工作，但我在让这个特定步骤工作时遇到问题： https ://developers.google.com/assistant/sdk/guides/library/ python/扩展/句柄设备命令
此步骤包括向 Pi 发送开/关命令以打开或关闭 LED 灯泡。我已经确认面包板和 LED 设置正确，因为我可以通过 python 脚本打开或关闭 LED。
但是，按照该页面中的步骤并尝试运行以下命令“python hotword.py --device_model_id my-model”（实际上是：python hotword.py --device_model_id assistantraspi-1d671-pigooglev2-8n98u3）我得到以下错误： ImportError: No module named pathlib2
我包括该文件的副本 (hotword.py)
#!/usr/bin/env python
# Copyright (C) 2017 Google Inc.
#
# 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.
from __future__ import print_function
import argparse
import json
import os.path
import pathlib2 as pathlib
import RPi.GPIO as GPIO
import google.oauth2.credentials
from google.assistant.library import Assistant
from google.assistant.library.event import EventType
from google.assistant.library.file_helpers import existing_file
from google.assistant.library.device_helpers import register_device
try:
FileNotFoundError
except NameError:
FileNotFoundError = IOError
WARNING_NOT_REGISTERED = """
This device is not registered. This means you will not be able to use
Device Actions or see your device in Assistant Settings. In order to
register this device follow instructions at:
https://developers.google.com/assistant/sdk/guides/library/python/embed/register-device
"""
def process_event(event):
"""Pretty prints events.
Prints all events that occur with two spaces between each new
conversation and a single space between turns of a conversation.
Args:
event(event.Event): The current event to process.
"""
if event.type == EventType.ON_CONVERSATION_TURN_STARTED:
print()
print(event)
if (event.type == EventType.ON_CONVERSATION_TURN_FINISHED and
event.args and not event.args['with_follow_on_turn']):
print()
if event.type == EventType.ON_DEVICE_ACTION:
for command, params in event.actions:
print('Do command', command, 'with params', str(params))
if command == "action.devices.commands.OnOff":
if params['on']:
print('Turning the LED on.')
GPIO.output(25, 1)
else:
print('Turning the LED off.')
GPIO.output(25, 0)
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument('--device-model-id', '--device_model_id', type=str,
metavar='DEVICE_MODEL_ID', required=False,
help='the device model ID registered with Google')
parser.add_argument('--project-id', '--project_id', type=str,
metavar='PROJECT_ID', required=False,
help='the project ID used to register this device')
parser.add_argument('--device-config', type=str,
metavar='DEVICE_CONFIG_FILE',
default=os.path.join(
os.path.expanduser('~/.config'),
'googlesamples-assistant',
'device_config_library.json'
),
help='path to store and read device configuration')
parser.add_argument('--credentials', type=existing_file,
metavar='OAUTH2_CREDENTIALS_FILE',
default=os.path.join(
os.path.expanduser('~/.config'),
'google-oauthlib-tool',
'credentials.json'
),
help='path to store and read OAuth2 credentials')
parser.add_argument('-v', '--version', action='version',
version='%(prog)s ' + Assistant.__version_str__())
args = parser.parse_args()
with open(args.credentials, 'r') as f:
credentials = google.oauth2.credentials.Credentials(token=None,
**json.load(f))
device_model_id = None
last_device_id = None
try:
with open(args.device_config) as f:
device_config = json.load(f)
device_model_id = device_config['model_id']
last_device_id = device_config.get('last_device_id', None)
except FileNotFoundError:
pass
if not args.device_model_id and not device_model_id:
raise Exception('Missing --device-model-id option')
# Re-register if "device_model_id" is given by the user and it differs
# from what we previously registered with.
should_register = (
args.device_model_id and args.device_model_id != device_model_id)
device_model_id = args.device_model_id or device_model_id
with Assistant(credentials, device_model_id) as assistant:
events = assistant.start()
device_id = assistant.device_id
print('device_model_id:', device_model_id)
print('device_id:', device_id + '\n')
GPIO.setmode(GPIO.BCM)
GPIO.setup(25, GPIO.OUT, initial=GPIO.LOW)
# Re-register if "device_id" is different from the last "device_id":
if should_register or (device_id != last_device_id):
if args.project_id:
register_device(args.project_id, credentials,
device_model_id, device_id)
pathlib.Path(os.path.dirname(args.device_config)).mkdir(
exist_ok=True)
with open(args.device_config, 'w') as f:
json.dump({
'last_device_id': device_id,
'model_id': device_model_id,
}, f)
else:
print(WARNING_NOT_REGISTERED)
for event in events:
process_event(event)
if __name__ == '__main__':
main()