Add get_mains() method

Returns the list of chars used ordered by the number of time they were
used.

lokrez/smashgg.py

@@ -119,6 +119,14 @@ class Player():
         except KeyError:
             self.chars[character] = ( 1.01 if win else 1.00 )
 
+    # -------------------------------------------------------------------------
+    def get_mains(self):
+        return [ cv[0] for cv in sorted(
+            self.chars.items(),
+            key = lambda cv: cv[1],
+            reverse = True,
+            ) ]
+
     # -------------------------------------------------------------------------
     def conf(self):