To export data from a tally form and access it in Python using an API, you'll need to perform the following steps:

1. Create a Tally form and collect data: First, create your form using Tally (**https://tally.so/**), and collect the data you want to process in Python.
2. Obtain an API key: To access your Tally data using the API, you need an API key. You can create an API key from your Tally account settings. To do this, go to **https://tally.so/account/developer** and click on "Create API key."
3. Access the Tally API in Python: Once you have the API key, you can use Python to access the Tally API and fetch your form data. You can use the popular 'requests' library to make API calls. To install it, run pip install requests in your terminal or command prompt.

Here's an example of how you can access the Tally API in Python:

import requests
import json

# Replace <YOUR_API_KEY> with your actual Tally API key
api_key = "<YOUR_API_KEY>"
headers = {"Authorization": f"Bearer {api_key}"}

# Replace <YOUR_FORM_ID> with the ID of your Tally form
form_id = "<YOUR_FORM_ID>"
url = f"<https://api.tally.so/v1/forms/{form_id}/responses>"

response = requests.get(url, headers=headers)

if response.status_code == 200:
    form_data = json.loads(response.text)
    print("Form data fetched successfully")
    print(form_data)
else:
    print(f"Error fetching form data. Status code: {response.status_code}")