direct: change some variables to not override language builtins/keywords

Closes #1120

direct/src/distributed/DistributedObject.py

@@ -124,8 +124,8 @@ class DistributedObject(DistributedObjectBase):
                     if field is not None:
                         p = DCPacker()
                         p.setUnpackData(field.getDefaultValue())
-                        len = p.rawUnpackUint16() // 4
-                        for i in range(len):
+                        length = p.rawUnpackUint16() // 4
+                        for i in range(length):
                             zone = int(p.rawUnpackUint32())
                             autoInterests.add(zone)
                     autoInterests.update(autoInterests)
@@ -141,9 +141,9 @@ class DistributedObject(DistributedObjectBase):
         _getAutoInterests = None
         return list(autoInterests)
 
-    def setNeverDisable(self, bool):
-        assert bool == 1 or bool == 0
-        self.neverDisable = bool
+    def setNeverDisable(self, boolean):
+        assert boolean == 1 or boolean == 0
+        self.neverDisable = boolean
 
     def getNeverDisable(self):
         return self.neverDisable
@@ -177,9 +177,9 @@ class DistributedObject(DistributedObjectBase):
         # call this to throw out cached data from a previous instantiation
         self._cachedData[name].flush()
 
-    def setCacheable(self, bool):
-        assert bool == 1 or bool == 0
-        self.cacheable = bool
+    def setCacheable(self, boolean):
+        assert boolean == 1 or boolean == 0
+        self.cacheable = boolean
 
     def getCacheable(self):
         return self.cacheable