execvp passes pep8

nova/utils.py

@@ -40,7 +40,7 @@ import netaddr
 from eventlet import event
 from eventlet import greenthread
 from eventlet.green import subprocess
-
+None
 from nova import exception
 from nova.exception import ProcessExecutionError
 from nova import log as logging
@@ -151,7 +151,8 @@ def execute(*cmd, **kwargs):
     obj.stdin.close()
     if obj.returncode:
         LOG.debug(_("Result was %s") % obj.returncode)
-        if check_exit_code is not None and obj.returncode != check_exit_code:
+        if type(check_exit_code) == types.IntType \
+                and obj.returncode != check_exit_code:
             (stdout, stderr) = result
             raise ProcessExecutionError(exit_code=obj.returncode,
                                         stdout=stdout,