quickstart.py credentials.json not found for read

[stephenboston]

Expected Behavior

As described in https://developers.google.com/gmail/api/quickstart/python

Actual Behavior

File "/hd2/projects/temp/python-samples/gmail/quickstart/quickstart.py", line 62, in
main()
File "/hd2/projects/temp/python-samples/gmail/quickstart/quickstart.py", line 41, in main
flow = InstalledAppFlow.from_client_secrets_file(
File "/home/stephen/.local/lib/python3.9/site-packages/google_auth_oauthlib/flow.py", line 180, in from_client_secrets_file
with open(client_secrets_file, 'r') as json_file:
FileNotFoundError: [Errno 2] No such file or directory: 'credentials.json'

Steps to Reproduce the Problem

1.Download these python samples

1. install requirements through requirements.txt
2. run the script

Specifications

• Python version (python --version)
• 3.9.6
• OS (Mac/Linux/Windows)
• Arch rolling[5.10.48-1-lts]

[Nadesri]

I had the same error but found I was just not reading carefully enough; based on your repro steps it's possible you ran into the same thing.

The README.md is a bit confusing about this, but you need to follow the Prerequisites in the Python Quickstart page first: https://developers.google.com/gmail/api/quickstart/python#prerequisites

Note the following requirements in particular:

• A Google Cloud Platform project with the API enabled. To create a project and enable an API, refer to Create a project and enable the API: https://developers.google.com/workspace/guides/create-project
  • Note: For this quickstart, you are enabling the "Gmail API".
• Authorization credentials for a desktop application. To learn how to create credentials for a desktop application, refer to Create credentials: https://developers.google.com/workspace/guides/create-credentials

[YoelMonsalve]

I had the same issue, and it's kind of silly (just had to read carefully). Create a credential for your desktop application (as it's based on Python) as described by Nadersi: https://developers.google.com/workspace/guides/create-credentials

Then, download the client secret JSON file: https://developers.google.com/workspace/guides/create-credentials#desktop

Note, when it says:

Click the download button to the right of the newly-created OAuth 2.0 Client ID. This copies a client secret JSON file to your desktop

This is the file they are referring as "credentials.json". Copy this client secret file to your proper location, rename it to "credentials.json" and of course, give it the read permissions.

[its-all-waves]

For anyone else having this issue who did follow the instructions to a T (except for one part)...

My issue was that I was trying to run quickstart.py from within VS Code (with venv active). Why can't this work? Hell if I know. But when ran the file in terminal --> python quickstart.py (after activating the same venv), it worked.

For the record, I did not have to change any permissions on the json file. It came with read permissions.