refactor: use ternary condition for fct_search

Author: rememberYou

pyrdf2vec/walkers/random.py

@@ -130,10 +130,7 @@ def extract_walks(self, kg: KG, entity: Vertex) -> List[Walk]:
             The list of unique walks for the provided entity.
 
         """
-        if self.max_walks is None:
-            fct_search = self._bfs
-        else:
-            fct_search = self._dfs
+        fct_search = self._bfs if self.max_walks is None else self._dfs
         if self.with_reverse:
             return [
                 r_walk[:-1] + walk