Python 3 compatibility + correctly find maketx.exe on Windows

openpype/hosts/maya/api/lib.py

@@ -5,6 +5,7 @@ import os
 import platform
 import uuid
 import math
+import sys
 
 import json
 import logging
@@ -130,7 +131,13 @@ def float_round(num, places=0, direction=ceil):
 def pairwise(iterable):
     """s -> (s0,s1), (s2,s3), (s4, s5), ..."""
     a = iter(iterable)
-    return itertools.izip(a, a)
+
+    if sys.version_info[0] == 2:
+        izip = itertools.izip
+    else:
+        izip = zip
+
+    return izip(a, a)
 
 
 def unique(name):

openpype/hosts/maya/plugins/publish/extract_look.py

@@ -4,6 +4,7 @@ import os
 import sys
 import json
 import tempfile
+import platform
 import contextlib
 import subprocess
 from collections import OrderedDict
@@ -58,6 +59,11 @@ def maketx(source, destination, *args):
     from openpype.lib import get_oiio_tools_path
 
     maketx_path = get_oiio_tools_path("maketx")
+
+    if platform.system().lower() == "windows":
+        # Ensure .exe extension
+        maketx_path += ".exe"
+
     if not os.path.exists(maketx_path):
         print(
             "OIIO tool not found in {}".format(maketx_path))
@@ -212,7 +218,7 @@ class ExtractLook(openpype.api.Extractor):
         self.log.info("Extract sets (%s) ..." % _scene_type)
         lookdata = instance.data["lookData"]
         relationships = lookdata["relationships"]
-        sets = relationships.keys()
+        sets = list(relationships.keys())
         if not sets:
             self.log.info("No sets found")
             return