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pythonintegerdivmod

list indices must be integers or slices, not float

I have a list, sortedInfected, which is made up of integers and with an unknown length.

When I run this script i get the error: "list indices must be integers or slices, not float".

How can i fix this?

medianList =[]
b = (len(sortedInfected) / 2)

if len(sortedInfected) % 2 == 0:

    median = (sortedInfected[b] + sortedInfected[b-1]) // 2
    medianList.append(median)
else:

    median = sortedInfected[b - 0.5]
    medianList.append(median)
Solution

  • In Python 3.x, the / operator performs floating point division. If you want int division use //

    b = len(sortedInfected) // 2

    You could therefore change your code to

    medianList =[]
b = (len(sortedInfected) // 2)

if len(sortedInfected) % 2 == 0:    
    median = (sortedInfected[b] + sortedInfected[b-1]) // 2
    medianList.append(median)
else:    
    median = sortedInfected[b]
    medianList.append(median)