def average(self, col):
        sum = reduce(lambda f, n: float(f) + float(n), self.get_column(col))
        return float(sum)/float(len(self))


# This should be  used to compare execution speed of different variants of a
# function.  The functions should take the same arguments, and return the same
# value. It checks that the return values match (i.e. they provide same
# results).
Return average value of column.
dataset/ETHPy150Open kdart/pycopia/core/pycopia/benchmarks.py/CompareResults.average