Update setup.py, enum module is required with Python 2.7 and < 3.4.0.

Kami · Kami · commit 5159babc482e · 2019-11-29T22:42:44.000+01:00
diff --git a/setup.py b/setup.py
@@ -126,6 +126,7 @@ def run(self):
 
 if PY2_or_3_pre_34:
     INSTALL_REQUIREMENTS.append('typing')
+    INSTALL_REQUIREMENTS.append('enum34')
 
 needs_pytest = {'pytest', 'test', 'ptr'}.intersection(sys.argv)
 pytest_runner = ['pytest-runner'] if needs_pytest else []
