Python 3 only

Problem 4. (Birthday Problem) Suppose that people enter an empty room until a pair of people share a birthday. On average, how many people will have to enter before there is a match? Write a program birthday.py that takes an integer trials from the command line and runs trials experiments to estimate this quantity, where each experiment involves sampling individuals until a pair of them share a birthday. Assume birthdays to be uniform random integers from the interval [0,365).

$ python3 birthday.py 1000

24