From a86bb1e0fc28f166f31b57259c31f9c6ee9bd5c3 Mon Sep 17 00:00:00 2001
From: David Vierra <codewarrior@hawaii.rr.com>
Date: Fri, 16 Sep 2016 03:54:35 -1000
Subject: [PATCH] Allow BlockType to be used in `if block` to test for air

---
 src/mceditlib/blocktypes/__init__.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mceditlib/blocktypes/__init__.py b/src/mceditlib/blocktypes/__init__.py
index 5c5f543..2de8cd2 100644
--- a/src/mceditlib/blocktypes/__init__.py
+++ b/src/mceditlib/blocktypes/__init__.py
@@ -90,7 +90,9 @@ class BlockType(namedtuple("_BlockType", "ID meta blocktypeSet")):
             return self.__dict__[attr]
 
         return self.blocktypeSet.getBlockTypeAttr(self, attr)
-
+    
+    def __nonzero__(self):
+        return int(self.ID) != 0  # self.ID is a numpy.int
 
 id_limit = 4096