diff --git a/gprof2dot.py b/gprof2dot.py
index fbaef79..4427410 100644
--- a/gprof2dot.py
+++ b/gprof2dot.py
@@ -1188,7 +1188,6 @@ class CallgrindParser(LineParser):
         _, values = line.split('=', 1)
         values = values.strip().split()
         calls = int(values[0])
-        call_position = values[1:]
         self.consume()
 
         self.parse_cost_line(calls)
@@ -1352,8 +1351,6 @@ class OprofileParser(LineParser):
 
         profile = Profile()
 
-        reverse_call_samples = {}
-
         # populate the profile
         profile[SAMPLES] = 0
         for _callers, _function, _callees in self.entries.itervalues():
@@ -1945,7 +1942,6 @@ class AQtimeParser(XmlParser):
         return table
 
     def parse_data(self):
-        rows = []
         attrs = self.element_start('DATA')
         table_id = int(attrs['TABLE_ID'])
         table_name, field_types, field_names = self.tables[table_id]
diff --git a/indev.py b/indev.py
index 9b2e4a7..f1ec0fc 100644
--- a/indev.py
+++ b/indev.py
@@ -299,7 +299,7 @@ class MCIndevLevel(EntityLevel):
         # output_file = gzip.open(self.filename, "wb", compresslevel=1)
         try:
             os.rename(filename, filename + ".old")
-        except Exception, e:
+        except Exception:
             pass
 
         try:
@@ -309,7 +309,7 @@ class MCIndevLevel(EntityLevel):
 
         try:
             os.remove(filename + ".old")
-        except Exception, e:
+        except Exception:
             pass
 
         self.BlockLight = self.Data & 0xf
diff --git a/infiniteworld.py b/infiniteworld.py
index d894402..d50fe72 100644
--- a/infiniteworld.py
+++ b/infiniteworld.py
@@ -2892,7 +2892,7 @@ class MCInfdevOldLevel(ChunkedLevelMixin, EntityLevel):
 
         try:
             chunk = self.getChunk(x >> 4, z >> 4)
-        except (ChunkNotPresent, ChunkMalformed), e:
+        except (ChunkNotPresent, ChunkMalformed):
             return None
             # raise Error, can't find a chunk?
         chunk.addEntity(entityTag)
diff --git a/level.py b/level.py
index b7daf7e..37e4da1 100644
--- a/level.py
+++ b/level.py
@@ -91,7 +91,6 @@ def getSlices(box, height):
         if cx == box.maxcx - 1:
             localMaxX = maxxoff
         newMinX = localMinX + (cx << 4) - box.minx
-        newMaxX = localMaxX + (cx << 4) - box.minx
 
         for cz in range(box.mincz, box.maxcz):
             localMinZ = 0
@@ -101,7 +100,6 @@ def getSlices(box, height):
             if cz == box.maxcz - 1:
                 localMaxZ = maxzoff
             newMinZ = localMinZ + (cz << 4) - box.minz
-            newMaxZ = localMaxZ + (cz << 4) - box.minz
             slices, point = (
                 (slice(localMinX, localMaxX), slice(localMinZ, localMaxZ), slice(miny, maxy)),
                 (newMinX, newMinY, newMinZ)
@@ -662,7 +660,6 @@ class EntityLevel(MCLevel):
         # if not self.hasEntities or not sourceLevel.hasEntities:
         #    return
         sourcePoint0 = sourceBox.origin
-        sourcePoint1 = sourceBox.maximum
 
         if sourceLevel.isInfinite:
             for i in self.copyEntitiesFromInfiniteIter(sourceLevel, sourceBox, destinationPoint, entities):
diff --git a/materials.py b/materials.py
index 4483d4b..d3ba751 100644
--- a/materials.py
+++ b/materials.py
@@ -179,19 +179,21 @@ class MCMaterials(object):
     def addYamlBlock(self, kw):
         blockID = kw['id']
 
-        unused_yaml_properties = \
-        ['explored',
-         # 'id',
-         # 'idStr',
-         # 'mapcolor',
-         # 'name',
-         # 'tex',
-         ### 'tex_data',
-         # 'tex_direction',
-         ### 'tex_direction_data',
-         'tex_extra',
-         # 'type'
-         ]
+        # xxx unused_yaml_properties variable unused; needed for
+        #     documentation purpose of some sort?  -zothar
+        #unused_yaml_properties = \
+        #['explored',
+        # # 'id',
+        # # 'idStr',
+        # # 'mapcolor',
+        # # 'name',
+        # # 'tex',
+        # ### 'tex_data',
+        # # 'tex_direction',
+        # ### 'tex_direction_data',
+        # 'tex_extra',
+        # # 'type'
+        # ]
 
         for val, data in kw.get('data', {0: {}}).items():
             datakw = dict(kw)
diff --git a/mce.py b/mce.py
index 3087117..cbcf81a 100644
--- a/mce.py
+++ b/mce.py
@@ -527,8 +527,6 @@ class mce(object):
 
         importLevel = mclevel.fromFile(filename)
 
-        destBox = BoundingBox(destPoint, importLevel.size)
-
         self.level.copyBlocksFrom(importLevel, importLevel.bounds, destPoint, blocksToCopy, create=True)
 
         self.needsSave = True
@@ -681,9 +679,7 @@ class mce(object):
                     print "Region {rx},{rz} not found.".format(**locals())
                     return
 
-                used = rf.usedSectors
-                sectors = rf.sectorCount
-                print "Region {rx:6}, {rz:6}: {used}/{sectors} sectors".format(**locals())
+                print "Region {rx:6}, {rz:6}: {used}/{sectors} sectors".format(used=rf.usedSectors, sectors=rf.sectorCount)
                 print "Offset Table:"
                 for cx in range(32):
                     for cz in range(32):
@@ -715,8 +711,7 @@ class mce(object):
             level.allChunks
             coords = (r for r in level.regionFiles)
             for i, (rx, rz) in enumerate(coords):
-                count = level.regionFiles[rx, rz].chunkCount
-                print "({rx:6}, {rz:6}): {count}, ".format(**locals()),
+                print "({rx:6}, {rz:6}): {count}, ".format(count=level.regionFiles[rx, rz].chunkCount),
                 if i % 5 == 4:
                     print ""
 
@@ -1376,7 +1371,7 @@ class mce(object):
         logging.basicConfig(format=u'%(levelname)s:%(message)s')
         logging.getLogger().level = logging.INFO
 
-        appPath = sys.argv.pop(0)
+        sys.argv.pop(0)
 
         if len(sys.argv):
             world = sys.argv.pop(0)
diff --git a/schematic.py b/schematic.py
index 022b6c2..1b2accd 100644
--- a/schematic.py
+++ b/schematic.py
@@ -541,12 +541,9 @@ def extractZipSchematicFromIter(sourceLevel, box, zipfilename=None, entities=Tru
 
     tempfolder = tempfile.mktemp("schematic")
     try:
-        done = False
         tempSchematic = MCInfdevOldLevel(tempfolder, create=True)
         tempSchematic.materials = sourceLevel.materials
 
-        destBox = BoundingBox(destPoint, sourceBox.size)
-
         for i in tempSchematic.copyBlocksFromIter(sourceLevel, sourceBox, destPoint, entities=entities, create=True):
             yield i
         tempSchematic.saveInPlace()  # lights not needed for this format - crashes minecraft though