How to resolve the 'drive_service' not defined error when downloading Google Drive files in Colab?

Other Questions Google drive
1

I’m encountering a problem while attempting to download files from Google Drive in my Colaboratory environment. When executing my code, I receive a NameError indicating that ‘drive_service’ is not defined.

This is the code I’m using:

file_id = '1uBtlaggVyWshwcyP6kEI-y_W3P8D26sz'

import io
from googleapiclient.http import MediaIoBaseDownload

request = drive_service.files().get_media(fileId=file_id)
downloaded_file = io.BytesIO()
downloader = MediaIoBaseDownload(downloaded_file, request)
completed = False
while not completed:
    _, completed = downloader.next_chunk()


downloaded_file.seek(0)
print('Contents of the downloaded file: {}'.format(downloaded_file.read()))

The error I’m facing is:

NameError: name 'drive_service' is not defined

What steps do I need to take to fix this? Is there a way to properly initialize the drive service?

2

The error you’re encountering indicates that drive_service hasn’t been initialized. To resolve this, you need to authenticate using Google’s authentication services first. I faced a similar issue while trying to access files in a project. The solution involves importing auth from google.colab and the build function from googleapiclient.discovery. Start by running auth.authenticate_user(), then create the service object with drive_service = build('drive', 'v3'). Make sure to perform the authentication in a separate cell to avoid the NameError with your download code.

3

ugh, yeah! that happens a lot. just remember to set up the drive_service before you try downloading. import it like this: from googleapiclient.discovery import build, then once you’ve authenticated, run drive_service = build('drive', 'v3'). without that, you’ll keep hitting that error.

4

You’re missing the authentication setup before using the Google Drive API. You need to authenticate and build the service object first. Add this code before your download section:

from google.colab import auth
from googleapiclient.discovery import build

auth.authenticate_user()
drive_service = build('drive', 'v3')

Had the same problem when I started with Drive API in Colab. Without authentication, Python doesn’t know what drive_service is. Once you authenticate and build the service, your download code should work fine. Just run the authentication cell first and grant permissions when it asks.