pep8: trivial fixes

Closes #161 (GH)

eventlet/wsgi.py

@@ -473,7 +473,7 @@ class HttpProtocol(BaseHTTPServer.BaseHTTPRequestHandler):
                 tb = traceback.format_exc()
                 self.server.log_message(tb)
                 if not headers_set:
-                    err_body =six.b(tb) if self.server.debug else b''
+                    err_body = six.b(tb) if self.server.debug else b''
                     start_response("500 Internal Server Error",
                                    [('Content-type', 'text/plain'),
                                     ('Content-length', len(err_body))])

tests/greenio_test.py

@@ -104,7 +104,7 @@ class TestGreenSocket(LimitedTestCase):
         s.settimeout(0.1)
         gs = greenio.GreenSocket(s)
         e = gs.connect_ex(('192.0.2.1', 80))
-        if not e in (errno.EHOSTUNREACH, errno.ENETUNREACH):
+        if e not in (errno.EHOSTUNREACH, errno.ENETUNREACH):
             self.assertEqual(e, errno.EAGAIN)
 
     def test_recv_timeout(self):

tests/mock.py

@@ -306,7 +306,7 @@ def _set_signature(mock, original, instance=False):
     src = """def %s(*args, **kwargs):
     _checksig_(*args, **kwargs)
     return mock(*args, **kwargs)""" % name
-    exec (src, context)
+    exec(src, context)
     funcopy = context[name]
     _setup_func(funcopy, mock)
     return funcopy
@@ -336,7 +336,7 @@ def _setup_func(funcopy, mock):
         funcopy.mock_calls = _CallList()
         mock.reset_mock()
         ret = funcopy.return_value
-        if _is_instance_mock(ret) and not ret is mock:
+        if _is_instance_mock(ret) and ret is not mock:
             ret.reset_mock()
 
     funcopy.called = False