Question

Cannot find out why this is not working?:

def frequencies(counts):    
    total = sum(counts)
    frequencies = []    
    for count in counts:
        frequencies.append(float(count/total))    
    return frequencies

It should take a list of intergers as argument and return a list of relative frequencies.

Answer 1

That is because sum() returns an integer and hence you are doing integer division.
Use

total = float(sum(counts))

instead or

frequencies.append(count/float(total))