isaiah isaiah-perumalla

## functions.py
def calc_avg(items):
  if not items:
    return 0
  total = sum(items)
  return  float(total)/len(items)


def std_deviation(items):
  if not items: return 0
  mean = calc_avg(items)
	def calc_avg(items):
	if not items:
	return 0
	total = sum(items)
	return float(total)/len(items)


	def std_deviation(items):
	if not items: return 0
	mean = calc_avg(items)