This subclass of Row is the parent class for the
two kinds of rows for which means and standard deviations are
computed, Section 32, “class PartyHoursRow: Heading row showing
total effort” and Section 34, “class CensusRow: Numbers of
individuals”. It contains a generic .suffixes() method that works for both the subclasses.
# - - - - - c l a s s S t a t R o w
class StatRow(Row):
'''Parent class for rows with statistics.
Exports (other than inherited items):
.suffixes():
[ returns a list containing two StatCell instances, one for
the mean of self and one for the standard deviation ]
'''