Bye Bye Moore


Pyhon3系でGoogle Driveと接続する その3:ファイルのダウンロード



from __future__ import print_function

import os.path
import io

from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError

from googleapiclient.http import MediaIoBaseDownload

# If modifying these scopes, delete the file token.json.
SCOPES = ['']

def main():
    """Shows basic usage of the Drive v3 API.
    Prints the names and ids of the first 10 files the user has access to.
    creds = None
    # The file token.json stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.json'):
        creds = Credentials.from_authorized_user_file('token.json', SCOPES)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.json', 'w') as token:

        service = build('drive', 'v3', credentials=creds)

        # Call the Drive v3 API
        file_id = 'XXX'
        request = service.files().get_media(fileId=file_id)
        fh = io.BytesIO()
        downloader = MediaIoBaseDownload(fh, request)
        done = False
        while done is False:
           status, done = downloader.next_chunk()
           print("Download %d%%." % int(status.progress() * 100))

        with open("foobar.file", "wb") as fp:

    except HttpError as error:
        # TODO(developer) - Handle errors from drive API.
        print(f'An error occurred: {error}')

if __name__ == '__main__':