please use python

Assume that a student inputs his/her lab marks for introduction to programming class. The marks are integers. When the student enters a negative number, it means that he/she is done with the entering of his/her marks. In this exercise, we want you to find the average of the marks after the Prof removes the worst 3 lab marks. If the students enters less than 4 marks, then print the average of these entered marks. Otherwise, remove the three worst numbers and calculate the average of the remaining marks. For example, if a student enters 129845245689331 The program should output : 72 for the average of 98455689 and for 129810 it should print 55 for the average of 12 and 98. For the average value you can choose integer or float data type