>>> range(1,2.5)
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    range(1,2.5)
TypeError: 'float' object cannot be interpreted as an integer

>>> l[1:2.5]
Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    l[1:2.5]
TypeError: slice indices must be integers or None or have an __index__ method

Error: You are not authorized to view this document

>>> class smoothList(list):
	def __getitem__(self, n):
		if type(n) == int:
			return super().__getitem__(n)
		elif type(n) == float and 0 < n < len(self):
			return self[int(n)]*(1-n%1) + self[int(n)+1]*(n%1)


>>> L = smoothList([1,2,3,4,5])
>>> L[3.05]
4.05
>>> L[3.55]
4.55