from bisect import bisect as bs

dictA = dict.fromkeys(xrange(1,48), dict.fromkeys(xrange(1,8),0)) # The way I prefer to do it.
dictB = {} # The way that works.

for x in xrange(1,48):
    dictB[x] = {1:0,2:0,3:0,4:0,5:0,6:0,7:0}

listOfData = [] # Contains the data Ex: (1,12,18,36,40,45,47)

for x in xrange(1,48):
    for row in listOfData:
        if x in row:
            dictA[x][bs(row,x)] += 1
            dictB[x][bs(row,x)] += 1


"""
DictB returns the correct values.
DictA returns the total number of rows in the listOfData
"""