Hi, 

I am trying to integrate with the phone UPI payment(Python)

From what I found in \https://developer.phonepe.com, I need a merchant id and a secret key to get started, and there is a test environment available. However, I didn't find much information about how can I make use of the test environment.

The example in the https://developer.phonepe.com/v1/reference#api-objectssection gives:

{
  "success": false,
  "code": "BAD_REQUEST",
  "message": "Please check the inputs you have provided.",
  "data": {}
}