base_n_to_decimal.py

def base_n_to_decimal(number, base, \
	symbolarray = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']):

	if(base > len(symbolarray)):
		raise ValueError

	result = 0
	number = str(number)

	for i in range(0, len(number)):
		intermediate = (base**i)*int(symbolarray.index(number[-i-1]))
		print "%s * %d^%d = %d" % (symbolarray.index(number[-i-1]), base, i, intermediate)
		result += intermediate

	print result