fix(Mac): fix unittest of macos

test=develop

Author: reyoung

.gitignore

@@ -1,3 +1,4 @@
+python/paddle/fluid/tests/unittests/reader_reset_test.recordio
 paddle/operators/check_t.save
 paddle/operators/check_tensor.ls
 paddle/operators/tensor.save

paddle/fluid/pybind/pybind.cc

@@ -357,14 +357,17 @@ All parameter, weight, gradient are variables in Paddle.
              return self.GetMutable<platform::Communicator>();
            },
            py::return_value_policy::reference)
+
+#endif
+#ifndef _WIN32
       .def("get_reader",
            [](Variable &self) -> framework::ReaderHolder * {
              PADDLE_ENFORCE(self.IsType<framework::ReaderHolder>());
              return self.GetMutable<framework::ReaderHolder>();
            },
            py::return_value_policy::reference)
 #endif
-      ;
+      ;  // NOLINT
 
 #if !defined(_WIN32)
   py::class_<framework::ReaderHolder>(m, "Reader", "")