From 49db41ca01026b18afc9a04fe7f7fe0a2cee5953 Mon Sep 17 00:00:00 2001
From: Corvince <13568919+Corvince@users.noreply.github.com>
Date: Sun, 26 Apr 2020 21:58:15 +0200
Subject: [PATCH] use filter for emptiness check

---
 mesa/space.py | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/mesa/space.py b/mesa/space.py
index 38a51db42d7..804ef910c5f 100644
--- a/mesa/space.py
+++ b/mesa/space.py
@@ -310,10 +310,7 @@ def iter_cell_list_contents(
             An iterator of the contents of the cells identified in cell_list
 
         """
-        for (x, y) in cell_list:
-            content = self.grid[x][y]
-            if not content == self.default_val():
-                yield content
+        return filter(None, (self.grid[x][y] for x, y in cell_list))
 
     @accept_tuple_argument
     def get_cell_list_contents(