diff --git a/streaming/language_support/python/pymongo_hadoop/__init__.py b/streaming/language_support/python/pymongo_hadoop/__init__.py
index 7920a603..24264393 100644
--- a/streaming/language_support/python/pymongo_hadoop/__init__.py
+++ b/streaming/language_support/python/pymongo_hadoop/__init__.py
@@ -1,10 +1,10 @@
 import sys
 
-from input import BSONInput, KeyValueBSONInput
-from output import BSONOutput, KeyValueBSONOutput
-from reducer import BSONReducer, BSONReducerInput
-from reducer import KeyValueBSONReducer, KeyValueBSONReducerInput
-from mapper import BSONMapper, KeyValueBSONMapper
+from .input import BSONInput, KeyValueBSONInput
+from .output import BSONOutput, KeyValueBSONOutput
+from .reducer import BSONReducer, BSONReducerInput
+from .reducer import KeyValueBSONReducer, KeyValueBSONReducerInput
+from .mapper import BSONMapper, KeyValueBSONMapper
 
 __all__ = ['BSONInput', 'BSONOutput',
            'KeyValueBSONOutput', 'KeyValueBSONInput',
@@ -13,5 +13,5 @@
 
 def dump_bits(bits):
     for bit in bits:
-        print >> sys.stderr, "\t * Bit: %s Ord: %d" % (hex(ord(bit)), ord(bit))
+        print("\t * Bit: %s Ord: %d" % (hex(ord(bit)), ord(bit)), file=sys.stderr)
 
diff --git a/streaming/language_support/python/pymongo_hadoop/input.py b/streaming/language_support/python/pymongo_hadoop/input.py
index f8516c7c..a7770afe 100644
--- a/streaming/language_support/python/pymongo_hadoop/input.py
+++ b/streaming/language_support/python/pymongo_hadoop/input.py
@@ -14,7 +14,7 @@ class BSONInput(object):
     https://github.com/klbostee/typedbytes
     """
 
-    def __init__(self, fh=sys.stdin, unicode_errors='strict'):
+    def __init__(self, fh=sys.stdin.buffer, unicode_errors='strict'):
         self.fh = fh
         self.unicode_errors = unicode_errors
         self.eof = False
@@ -26,11 +26,11 @@ def _read(self):
             data = size_bits + self.fh.read(size)
             if len(data) != size + 4:
                 raise struct.error("Unable to cleanly read expected BSON Chunk; EOF, underful buffer or invalid object size.")
-            if data[size + 4 - 1] != "\x00":
+            if data[size + 4 - 1] != 0:
                 raise InvalidBSON("Bad EOO in BSON Data")
             doc = BSON(data).decode(codec_options=STREAMING_CODEC_OPTIONS)
             return doc
-        except struct.error, e:
+        except struct.error as e:
             #print >> sys.stderr, "Parsing Length record failed: %s" % e
             self.eof = True
             raise StopIteration(e)
@@ -38,8 +38,8 @@ def _read(self):
     def read(self):
         try:
             return self._read()
-        except StopIteration, e:
-            print >> sys.stderr, "Iteration Failure: %s" % e
+        except StopIteration as e:
+            print("Iteration Failure: %s" % e, file=sys.stderr)
             return None
 
     def _reads(self):
@@ -56,8 +56,8 @@ class KeyValueBSONInput(BSONInput):
     def read(self):
         try:
             doc = self._read()
-        except StopIteration, e:
-            print >> sys.stderr, "Key/Value Input iteration failed/stopped: %s" % e
+        except StopIteration as e:
+            print("Key/Value Input iteration failed/stopped: %s" % e, file=sys.stderr)
             return None
         if '_id' in doc:
             return doc['_id'], doc
@@ -66,7 +66,7 @@ def read(self):
 
     def reads(self):
         it = self._reads()
-        n = it.next
+        n = it.__next__
         while 1:
             doc = n()
             if '_id' in doc:
diff --git a/streaming/language_support/python/pymongo_hadoop/mapper.py b/streaming/language_support/python/pymongo_hadoop/mapper.py
index 90753d2a..5d6e1374 100644
--- a/streaming/language_support/python/pymongo_hadoop/mapper.py
+++ b/streaming/language_support/python/pymongo_hadoop/mapper.py
@@ -1,5 +1,5 @@
-from input import BSONInput, KeyValueBSONInput
-from output import BSONOutput, KeyValueBSONOutput
+from .input import BSONInput, KeyValueBSONInput
+from .output import BSONOutput, KeyValueBSONOutput
 
 class BSONMapper(object):
     """Wraps BSONInput to allow writing mapper functions
diff --git a/streaming/language_support/python/pymongo_hadoop/output.py b/streaming/language_support/python/pymongo_hadoop/output.py
index fbb9b0d8..d3c9f86b 100644
--- a/streaming/language_support/python/pymongo_hadoop/output.py
+++ b/streaming/language_support/python/pymongo_hadoop/output.py
@@ -10,7 +10,7 @@ class BSONOutput(object):
     https://github.com/klbostee/typedbytes
     """
 
-    def __init__(self, fh=sys.stdout, unicode_errors='strict'):
+    def __init__(self, fh=sys.stdout.buffer, unicode_errors='strict'):
         self.fh = fh
         self.unicode_errors = unicode_errors
 
diff --git a/streaming/language_support/python/pymongo_hadoop/reducer.py b/streaming/language_support/python/pymongo_hadoop/reducer.py
index b11ffb57..be69b6e5 100644
--- a/streaming/language_support/python/pymongo_hadoop/reducer.py
+++ b/streaming/language_support/python/pymongo_hadoop/reducer.py
@@ -3,8 +3,8 @@
 https://github.com/klbostee/dumbo
 """
 from itertools import groupby
-from input import BSONInput, KeyValueBSONInput
-from output import BSONOutput, KeyValueBSONOutput
+from .input import BSONInput, KeyValueBSONInput
+from .output import BSONOutput, KeyValueBSONOutput
 
 import sys
 
@@ -55,7 +55,7 @@ def __init__(self, factory=None, input_fh=None):
 
 
 def default_reducer(data):
-    print >> sys.stderr, "*** Invoking default reducer function, this is unoptimized for your data and may be very slow."
+    print("*** Invoking default reducer function, this is unoptimized for your data and may be very slow.", file=sys.stderr)
 
 class BSONReducerInput(BSONInput):
     """Wrapper to 'roll up' the reduce data down to just