Use Python 3 syntax for new-style clasess

1 files changed, 7 insertions, 4 deletions

diff --git a/pkg_resources/__init__.py b/pkg_resources/__init__.py
index 91d00483..67015408 100644
--- a/pkg_resources/__init__.py
+++ b/pkg_resources/__init__.py
@@ -78,6 +78,9 @@ __import__('pkg_resources.extern.packaging.requirements')
 __import__('pkg_resources.extern.packaging.markers')
 
 
+__metaclass__ = type
+
+
 if (3, 0) < sys.version_info < (3, 4):
     raise RuntimeError("Python 3.4 or later is required")
 
@@ -537,7 +540,7 @@ class IResourceProvider(IMetadataProvider):
         """List of resource names in the directory (like ``os.listdir()``)"""
 
 
-class WorkingSet(object):
+class WorkingSet:
     """A collection of active distributions on sys.path (or a similar list)"""
 
     def __init__(self, entries=None):
@@ -944,7 +947,7 @@ class _ReqExtras(dict):
         return not req.marker or any(extra_evals)
 
 
-class Environment(object):
+class Environment:
     """Searchable snapshot of distributions on a search path"""
 
     def __init__(
@@ -2279,7 +2282,7 @@ EGG_NAME = re.compile(
 ).match
 
 
-class EntryPoint(object):
+class EntryPoint:
     """Object representing an advertised importable object"""
 
     def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
@@ -2433,7 +2436,7 @@ def _version_from_file(lines):
     return safe_version(value.strip()) or None
 
 
-class Distribution(object):
+class Distribution:
     """Wrap an actual or potential sys.path entry w/metadata"""
     PKG_INFO = 'PKG-INFO'