沒有名為pathlib2的模塊

Question

我一直在努力讓Google智能助理在我的Raspberry Pi 3上工作。它正在運行，但我在解決這個具體步驟時遇到了問題： https ： //developers.google.com/assistant/sdk/guides/library/蟒/延伸/處理設備的命令

此步驟包括向Pi發送開/關命令以打開或關閉LED燈泡。 我已經確認面包板和LED設置正確，因為我可以通過python腳本打開或關閉LED。

但是，按照該頁面中的步驟並嘗試運行以下命令“python hotword.py --device_model_id my-model”（實際上是：python hotword.py --device_model_id assistantraspi-1d671-pigooglev2-8n98u3）我得到了以下錯誤：ImportError：沒有名為pathlib2的模塊

我要包含該文件的副本（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()

Answer 1

您是否嘗試安裝pathlib2與pip或pip3 ？ 請試試

pip install pathlib2

如果您使用的是Python2，那么

pip3 install pathlib2

如果您使用的是Python3。 但是，如果找不到pip ，請嘗試安裝它

apt-get install python-pip python3-pip

Answer 2

謝謝你的建議。 事實證明解決方案非常簡單。

解決方案有兩個方面：1：我必須先運行以下命令：

source env/bin/activate

然后我可以運行python腳本而不會出錯

(env) pi@raspberrypi:~/assistant-sdk-python/google-assistant-sdk/googlesamples/assistant/library $ python hotword.py --device_model_id assistantraspi-1d671-pigooglev2-8n98u3

隨着我逐步完成這些文章，源本身就會被停用並返回到正常的提示符，首先以（env）開頭。
試圖在沒有先加載源命令的情況下運行python腳本就是問題所在。

我仍然沒有完全理解這一切是如何運作的，但我會繼續插入並希望了解運行此命令的第一步

source env/bin/activate

Answer 3

確保您在虛擬環境中工作。

如果沒有進入虛擬環境並試一試。

如果在虛擬環境中執行以下命令時仍然遇到問題，請重試：

sudo pip3 install pathlib2

這對我有用

Answer 4

這是腳本使用的命令。

sudo apt-get install python-psutil