Python – How to upload file to google drive with service account credential

google apigoogle-api-python-clientgoogle-drive-apipythonservice-accounts

I wanted to upload the files to my Google Drive using a Google service account credentials.

I downloaded credential as a JSON file from Google Developer Console, and got credential from it.

Here is my code snippet.

google_drive_service = discovery.build('drive', 'v3',
          credentials=ServiceAccountCredentials.from_json_keyfile_name
                           os.path.join(settings.CLIENT_PATH, settings.CLIENT_SECRET_FILE),
                           scopes=settings.SCOPES))


media = MediaFileUpload(tmp_file_path, mimetype=tmp_file.content_type, resumable=True)
google_drive_service.files().create(body=file_metadata, media_body=media, fields='id').execute()

The code runs and there is no error, however I can't find out the files uploaded to my Google Drive account. I am not sure why files are not uploaded. Would you like to help me to fix this problem?

Best Answer

The issue you are having is that a service account is not you. you have uploaded a file to the service accounts Google drive account not your personal drive account. Try doing a file list you should see the file.

Suggestion. Take the service account email address and share a directory on your personal Google drive account with it like you would share with any other user. The Service account will then be able to upload to this directory. Just make sure to set the permissions on the file after you upload it granting your personal drive account access to the file. When the file is uploaded it will be owned by the service account.

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Python – How to check whether a file exists without exceptions

If the reason you're checking is so you can do something like if file_exists: open_it(), it's safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it.

If you're not planning to open the file immediately, you can use os.path.isfile

Return True if path is an existing regular file. This follows symbolic links, so both islink() and isfile() can be true for the same path.

import os.path
os.path.isfile(fname)

if you need to be sure it's a file.

Starting with Python 3.4, the pathlib module offers an object-oriented approach (backported to pathlib2 in Python 2.7):

from pathlib import Path

my_file = Path("/path/to/file")
if my_file.is_file():
    # file exists

To check a directory, do:

if my_file.is_dir():
    # directory exists

To check whether a Path object exists independently of whether is it a file or directory, use exists():

if my_file.exists():
    # path exists

You can also use resolve(strict=True) in a try block:

try:
    my_abs_path = my_file.resolve(strict=True)
except FileNotFoundError:
    # doesn't exist
else:
    # exists

Python – How to copy a file in Python

shutil has many methods you can use. One of which is:

from shutil import copyfile
copyfile(src, dst)

# 2nd option
copy(src, dst)  # dst can be a folder; use copy2() to preserve timestamp

Copy the contents of the file named src to a file named dst. Both src and dst need to be the entire filename of the files, including path.
The destination location must be writable; otherwise, an IOError exception will be raised.
If dst already exists, it will be replaced.
Special files such as character or block devices and pipes cannot be copied with this function.
With copy, src and dst are path names given as strs.

Another shutil method to look at is shutil.copy2(). It's similar but preserves more metadata (e.g. time stamps).

If you use os.path operations, use copy rather than copyfile. copyfile will only accept strings.

Best Answer

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Python – How to check whether a file exists without exceptions

Python – How to copy a file in Python

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