@@ -1,4 +1,4 @@
 .cache
 dist/
 ffmpeg/tests/sample_data/dummy2.mp4
-venv
+venv*
@@ -1,3 +1,4 @@
+from __future__ import unicode_literals
 from . import _filters, _ffmpeg, _run
 from ._filters import *
 from ._ffmpeg import *
 
@@ -1,3 +1,4 @@
+from __future__ import unicode_literals
 from .nodes import (
     FilterNode,
     GlobalNode,
 
@@ -1,3 +1,4 @@
+from __future__ import unicode_literals
 from .nodes import (
     FilterNode,
     operator,
 
@@ -1,3 +1,6 @@
+from __future__ import unicode_literals
+
+from past.builtins import basestring
 import operator as _operator
 import subprocess as _subprocess
 
@@ -13,6 +16,7 @@
     operator,
     OutputNode,
 )
+from functools import reduce
 
 def _get_stream_name(name):
     return '[{}]'.format(name)
 
@@ -1,3 +1,6 @@
+from __future__ import unicode_literals
+
+from builtins import object
 import hashlib
 import json
 
@@ -18,15 +21,18 @@ def __repr__(self):
         formatted_props += ['{}={!r}'.format(key, self._kwargs[key]) for key in sorted(self._kwargs)]
         return '{}({})'.format(self._name, ','.join(formatted_props))
 
+    def __hash__(self):
+        return int(self._hash, base=16)
+
     def __eq__(self, other):
         return self._hash == other._hash
 
     def _update_hash(self):
         props = {'args': self._args, 'kwargs': self._kwargs}
-        my_hash = hashlib.md5(json.dumps(props, sort_keys=True)).hexdigest()
+        my_hash = hashlib.md5(json.dumps(props, sort_keys=True).encode('utf-8')).hexdigest()
         parent_hashes = [parent._hash for parent in self._parents]
         hashes = parent_hashes + [my_hash]
-        self._hash = hashlib.md5(','.join(hashes)).hexdigest()
+        self._hash = hashlib.md5(','.join(hashes).encode('utf-8')).hexdigest()
 
 
 class InputNode(Node):
 
@@ -1,4 +1,4 @@
-from ffmpeg.nodes import operator, FilterNode
+from __future__ import unicode_literals
 import ffmpeg
 import os
 import pytest
@@ -72,12 +72,12 @@ def test_repr():
     trim3 = ffmpeg.trim(in_file, start_frame=50, end_frame=60)
     concatted = ffmpeg.concat(trim1, trim2, trim3)
     output = ffmpeg.output(concatted, 'dummy2.mp4')
-    assert repr(in_file) == "input(filename='dummy.mp4')"
+    assert repr(in_file) == "input(filename={!r})".format('dummy.mp4')
     assert repr(trim1) == "trim(end_frame=20,start_frame=10)"
     assert repr(trim2) == "trim(end_frame=40,start_frame=30)"
     assert repr(trim3) == "trim(end_frame=60,start_frame=50)"
     assert repr(concatted) == "concat(n=3)"
-    assert repr(output) == "output(filename='dummy2.mp4')"
+    assert repr(output) == "output(filename={!r})".format('dummy2.mp4')
 
 
 def test_get_args_simple():
-Original file line number
+Diff line change
@@ @@ -1,4 +1,4 @@ @@
 .cache
 dist/
 ffmpeg/tests/sample_data/dummy2.mp4
 -venv
 +venv*
Original file line number	Diff line number	Diff line change
@@ -1,3 +1,4 @@
	1	+ from __future__ import unicode_literals
1	2	from . import _filters, _ffmpeg, _run
2	3	from ._filters import *
3	4	from ._ffmpeg import *
Original file line number	Diff line number	Diff line change
@@ -1,3 +1,4 @@
	1	+ from __future__ import unicode_literals
1	2	from .nodes import (
2	3	FilterNode,
3	4	GlobalNode,