from collections import defaultdict

#some code goes here presumably
        start = time.time()
        sap = self.wb_sap.worksheets[0] #Sets The First Sheet in the Excel Workbook as the variable sap IN THE FUTURE THIS WILL BE MODIFIED TO BE THE SAME NUMBERED SHEET AS BEFORE
        wt = self.wb_wt.worksheets[1]#Sets the Trimmed Sheet in the Second Report as the var wt
        #This Set of Nested Loops goes through Tests for X's to T's Based on the Report - Report Comparison
        print(datetime.datetime.today())
        indexed_wt = defaultdict(list)
        for wtrow in wt.iter_rows():
            key = (wtrow[3].value, wtrow[2].value)
            indexed_wt[key].append(wtrow)
        for saprow in sap.iter_rows():
            key = (saprow[3].value, saprow[2].value)
            for wtrow in indexed_wt[key]:
                if wtrow[4].value in ("T","P"): #New Report Entry is Marked as T/P
                    self.deadrows.append(wtrow)
                    if saprow[4].value is "X": #Old Report Entry is Marked as X
                        self.XT += 1#Increment X->Ts Counts
                    else:
                        self.TT += 1#Increment T->T Count

#uhhhhh. Not sure where these should go, since we deleted the `if` they used to connect to.
#elif wtrow[4].value in ("T","P"):
#    self.deadrows.append(wtrow)
#elif wtrow not in self.deadrows:
#        self.goodrows.append(wtrow)

        print("Timing: ", endtime-start)