从Google Drive下载文件至Colaboratory时出错，如何解决？

Hey there! Let's troubleshoot the issues you're facing when downloading files from Google Drive to Colab. I'll walk you through the most common problems and their fixes:

The first thing to check is whether you've properly authenticated and mounted your Drive in Colab. If you skipped this step or the authorization expired, you'll get errors when trying to access files.

Here's the correct way to mount your Drive:

from google.colab import drive
drive.mount('/content/drive')

When you run this, you'll get a link to log into your Google account, copy the authorization code, and paste it back into the Colab cell. If you get a "permission denied" error during mounting, make sure you're using the correct Google account that has access to the files.

Colab mounts your Drive at /content/drive/MyDrive/—so any file path you use needs to start with this root. A lot of errors happen because of typos, wrong folder names, or case sensitivity (Google Drive paths are case-sensitive!).

To verify your file exists at the path you're using, run this command to list the contents of your target folder:

!ls /content/drive/MyDrive/your-folder-name-here

If the file doesn't show up, double-check the folder structure in your Google Drive to make sure you're using the exact path.

If you're trying to download a large file (usually over 100MB), direct wget commands might hit Google Drive's quota limits or throw a "too many redirects" error. Instead, use the gdown library—it's designed to bypass these restrictions.

First install gdown:

!pip install gdown

Then get your file's ID from its Google Drive URL:

For a file URL like https://drive.google.com/file/d/123abcXYZ/view, the ID is 123abcXYZ

Download the file with:

!gdown --id 123abcXYZ

If you need to download an entire folder, use the --folder flag:

!gdown --folder --id your-folder-id

If the file is shared with you (not in your own Drive), you might get "access denied" errors. Fix this by:

• Asking the file owner to set the sharing permission to "Anyone with the link can view"
• Or, add the shared file to your own Drive: Open the shared file in Google Drive, click the "Add to My Drive" button (top-right corner), then access it via /content/drive/MyDrive/ in Colab.

• Restart your Colab session: Sometimes temporary bugs cause errors—go to Runtime > Restart runtime and try again.
• Check for special characters: If your file/folder name has spaces, commas, or non-English characters, wrap the path in quotes, like:

  !cp "/content/drive/MyDrive/My File With Spaces.txt" .
  

• Verify your internet connection: Flaky network can cause partial downloads or timeouts—re-run the download command if this happens.

内容的提问来源于stack exchange，提问作者A Santosh