Toward Python3: str/None comparison

apachedex/__init__.py

@@ -82,6 +82,7 @@ AUTO_PERIOD_COEF = 200
 # Larger (x < LARGER_THAN_INTEGER_STR == True) than any string starting with
 # a number
 LARGER_THAN_INTEGER_STR = 'A'
+SMALLER_THAN_INTEGER_STR = ''
 
 def statusIsError(status):
   return status[0] > '3'
@@ -997,7 +998,7 @@ def asHTML(out, encoding, per_site, args, default_site, period_parameter_dict,
     '<tr><th>date</th><th>hits</th></tr>' % period)
   hit_per_day = defaultdict(int)
   x_min = LARGER_THAN_INTEGER_STR
-  x_max = None
+  x_max = SMALLER_THAN_INTEGER_STR
   for site_data in per_site.itervalues():
     apdex_data_list = site_data.getApdexData()
     if apdex_data_list:
@@ -1007,6 +1008,7 @@ def asHTML(out, encoding, per_site, args, default_site, period_parameter_dict,
         hit_per_day[decimator(hit_date)] += hit
   if x_min == LARGER_THAN_INTEGER_STR:
     x_min = None
+    x_max = None
   for hit_date, hit in sorted(hit_per_day.iteritems(), key=ITEMGETTER0):
     out.write('<tr><td>%s</td><td>%s</td></tr>' % (hit_date, hit))
   out.write('</table>')
@@ -1330,9 +1332,9 @@ def main():
         continue
       hit_date = asDate(match.group('timestamp'))
       if to_next_period is not None:
-        if hit_date > latest_date: # '' > None is True
+        if latest_date is None or latest_date < hit_date:
           latest_date = hit_date
-        if hit_date < earliest_date or earliest_date is None:
+        if earliest_date is None or hit_date < earliest_date:
           earliest_date = hit_date
           next_period = getNextPeriod()
         try: