gistfile1.py

outerdic = {}
mkfrflist = []

with open('F-F_Research_Data_Factors_daily.txt') as fh:
    lines = fh.readlines()
	slicedline = lines[6:-2]
	header = lines[5].split()
	for element in slicedline:
		date = element.split()[0][:6]
		mkfrflist.append(float(element.split()[1])
		outerdic[date] = mkfrflist
	 

    sorteddic = sorted(outerdic. key=int)

    sumdic = sum(mkfrflist)

    keys = outerdic.keys()

    for key in keys:

        print key: + 'sum {0}, len {1}, avg {2}'.format(sumdic,len(mkfrflist), sumdic/len(mkfrflist)