can only compare Block against another Block (for now)

2011-10-30 20:05:50 -10:00 · 2011-10-30 20:05:50 -10:00 · 41fe391c2a
commit 41fe391c2a
parent 214c5a547c
1 changed files with 1 additions and 0 deletions
--- a/materials.py
+++ b/materials.py
@ -31,6 +31,7 @@ class Block(object):
        return str(self)
    
    def __cmp__(self, other):
+        if not isinstance(other, Block): return False
        key = lambda a:a and (a.ID, a.blockData)
        return cmp( key(self), key(other))