Fixing logdice all stat (and mini refactoring)

wani.py

@@ -1133,7 +1133,6 @@ class StatsFormatter(Formatter):
         self.corew = tuple(corew)
     
     def new_match(self, match):
-        jppb_forms = set()
         self.stats = {"freq": {}}
 
         for cid in self.corew:
@@ -1145,17 +1144,16 @@ class StatsFormatter(Formatter):
 
             self.stats["freq"][cid] = freq
 
-        fx = self.stats['freq'][self.jppb[0]]
-        fy = self.stats['freq'][self.jppb[1]]
+        fx = self.stats["freq"][self.jppb[0]]
+        fy = self.stats["freq"][self.jppb[1]]
         freq = len(match)
         N = self.word_renderer.num_all_words()
 
-        self.stats['delta_12'] = freq / fx - (fy - freq) / (N - fx)
-        self.stats['delta_21'] = freq / fy - (fx - freq) / (N - fy)
+        self.stats['d12'] = freq / fx - (fy - freq) / (N - fx)
+        self.stats['d21'] = freq / fy - (fx - freq) / (N - fy)
 
         self.stats['df'] = match.distinct_forms()
         self.stats['freq_all'] = freq
-        self.stats['n'] = len(jppb_forms)
 
     def header_repeat(self):
         return ["Distribution"]
@@ -1174,18 +1172,17 @@ class StatsFormatter(Formatter):
         return [self.stat_str(distribution)]
     
     def content_right(self, freq):
-        fx = self.stats['freq'][self.jppb[0]]
-        fy = self.stats['freq'][self.jppb[1]]
+        fx = self.stats["freq"][self.jppb[0]]
+        fy = self.stats["freq"][self.jppb[1]]
         freq = self.stats['freq_all']
         logdice_core = 14 + log2(2 * freq / (fx + fy))
 
-        sum_fi = sum(self.stats['freq'][idx] for idx in self.corew)
-        logdice_all = 14 + log2(len(self.corew) * freq / sum_fi)
+        fi = [self.stats["freq"][idx] for idx in self.corew]
+        fi = [f for f in fi if f > 0]
+        logdice_all = 14 + log2(len(fi) * freq / sum(fi))
 
-        dp12 = self.stats["delta_12"]
-        dp21 = self.stats["delta_21"]
         return [self.stat_str(x) for x in (
-            dp12, dp21, logdice_core, logdice_all, self.stats['df']
+            self.stats["d12"], self.stats["d21"], logdice_core, logdice_all, self.stats['df']
         )]
     
     def group(self):