Fix for python3

nexlibs/singleton.py

@@ -58,6 +58,8 @@ Call <Class>.getInstance() to get the single instance of <Class>.
 Any arguments passed to <Class>.getInstance() will be passed on
 to your <Class>.__init__.
 """
+import six
+
 
 class SingletonException(Exception):
    pass
@@ -96,7 +98,8 @@ class Singleton(object, metaclass=MetaSingleton):
    _isInstantiated = classmethod(_isInstantiated)   
 
    def _getConstructionArgCountNotCountingSelf(cls):
-      return cls.__init__.__func__.__code__.co_argcount - 1
+      #return cls.__init__.__func__.__code__.co_argcount - 1
+      return six.get_function_code(cls.__init__).co_argument -1
    _getConstructionArgCountNotCountingSelf = classmethod(_getConstructionArgCountNotCountingSelf)
 
    def _forgetClassInstanceReferenceForTesting(cls):

nexlibs/utils/webutils.py

@@ -21,7 +21,7 @@
 from twisted.web import client, error, http
 from twisted.internet import protocol, reactor, defer, task
 from twisted.python import failure
-from twisted.python.compat import nativeString, intToBytes, str, itervalues
+from twisted.python.compat import nativeString, intToBytes, itervalues
 from urllib.parse import urlunparse
 from urllib.parse import splithost, splittype
 import gzip