Moving to Functional

[swisscheese]

Can anyone help explain how to make this snippet follow a more functional style? I was able to functionalize other portions of the code but having trouble with this.

def Report ():
    data = Load ()
    Report = ""
    LastDate = GetDate (data[0])
    Count = 0; Counts = [0,0,0,0,0,0,0,0,0,0]
    for rec in data:
        Count += 1
        ThisDate = RecToDate (rec)
        if ThisDate != LastDate:
            Report += Summary (Count,Counts)
            Count = 0; Counts = [0,0,0,0,0,0,0,0,0,0]
            LastDate = ThisDate
        for j in range (10): Counts[j] += RecRan (rec,j)
        Report += str (rec)
    return Report