How to create gmail filters programmatically?

@dana 

To create Gmail filters programmatically, you can use the Gmail API provided by Google. Here are the steps to create filters using the Gmail API:

1. Enable the Gmail API in the Google Developers Console.
2. Create a new project and enable the Gmail API for that project.
3. Generate OAuth credentials for your project.
4. Install the Gmail API client library for your programming language of choice (e.g. Python, Java, Node.js).
5. Authenticate with the Gmail API using the OAuth credentials you generated.
6. Use the Gmail API to create a filter using the filters resource. You can specify the criteria for the filter, such as the email address, subject, or keywords to filter by.
7. Execute the API call to create the filter.

Here is an example in Python using the Gmail API client library:

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from googleapiclient.discovery import build
from google.oauth2.credentials import Credentials

# Authenticate with the Gmail API
credentials = Credentials.from_authorized_user_file('credentials.json')
service = build('gmail', 'v1', credentials=credentials)

# Create a filter
filter = {
    'criteria': {
        'from': '[email protected]'
    },
    'action': {
        'addLabelIds': ['Label_1']
    }
}

result = service.users().settings().filters().create(userId='me', body=filter).execute()
print('Filter created: {}'.format(result))

You can modify the criteria and action fields in the filter object to create filters based on your specific requirements. Make sure to handle errors and exceptions appropriately in your code.