use python only

Write a program that will read a series of numbers from the user and maintain an average of the positive numbers entered. If the user enters a number that is not positive, then the program will immediately exit and display the average. Notes: - Input could be an integer or floating point value, so you should use float() to convert the input into a number. - If no positive numbers are entered, the program should display "Average: undefined". - The average should be rounded to 2 dp when displayed. - The output must be in the format shown in the examples below, including the format of the prompt, spaces, and punctuation. For example