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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def selection_collision(selections, poolsize):
 	""" 	Calculate the probability that two random values selected from an arbitrary 	sized pool of unique values will be equal. This is commonly known as the 	"Birthday Problem". 	:param int selections: The number of random selections. 	:param int poolsize: The number of unique random values in the pool to choose from. 	:rtype: float 	:return: The chance that a collision will occur as a percentage. 	"""

	# requirments = sys
	probability = 100.0
	poolsize = float(poolsize)
	for i in range(selections):
		probability = probability * (poolsize - i) / poolsize
	probability = (100.0 - probability)
	return probability