diff --git a/pytriqs/wrap_generator/py_converter_wrapper.mako.hpp b/pytriqs/wrap_generator/py_converter_wrapper.mako.hpp
index b55ea440..0b63d8ea 100644
--- a/pytriqs/wrap_generator/py_converter_wrapper.mako.hpp
+++ b/pytriqs/wrap_generator/py_converter_wrapper.mako.hpp
@@ -71,8 +71,6 @@ template<> struct py_converter<${c.c_type_absolute}> {
 
 %for en in module.enums :
 
-namespace triqs { namespace py_tools { 
-
 template <> struct py_converter<${en.c_name_absolute}> {
  static PyObject * c2py(${en.c_name_absolute} x) {
    %for n,val in enumerate(en.values[:-1]) :
@@ -104,7 +102,6 @@ template <> struct py_converter<${en.c_name_absolute}> {
  }
 };
 
-}}
 %endfor
 
 }}
diff --git a/pytriqs/wrap_test/CMakeLists.txt b/pytriqs/wrap_test/CMakeLists.txt
index 908a2f6d..9444e69f 100644
--- a/pytriqs/wrap_test/CMakeLists.txt
+++ b/pytriqs/wrap_test/CMakeLists.txt
@@ -10,6 +10,7 @@ install (FILES ${PYTHON_SOURCES} DESTINATION ${TRIQS_PYTHON_LIB_DEST}/wrap_test)
 # Build C extension module 
 triqs_python_extension(my_module wrap_test)
 triqs_python_extension(my_moduleB wrap_test)
+triqs_python_extension(test_g wrap_test)
 # ??triqs_set_rpath_for_target(my_module)
 
 include_directories( ${CMAKE_CURRENT_SOURCE_DIR} )
diff --git a/pytriqs/wrap_test/g.hpp b/pytriqs/wrap_test/g.hpp
new file mode 100644
index 00000000..429ea49e
--- /dev/null
+++ b/pytriqs/wrap_test/g.hpp
@@ -0,0 +1,26 @@
+#include <triqs/gfs.hpp>
+using namespace triqs::gfs;
+using namespace triqs;
+
+block_gf_view<imfreq> make_bgf(double a) {
+
+ double beta = 1;
+ auto G1 = gf<imfreq>({beta, Fermion}, {2, 2});
+
+ auto B1 = make_block_gf<imfreq>(3, G1);
+
+ {
+  H5::H5File file("ess_test_g1.h5", H5F_ACC_TRUNC);
+  h5_write(file, "g", B1);
+ }
+
+ return B1;
+}
+
+void pass_bgf(block_gf_view<imfreq> g) {
+
+ {
+  H5::H5File file("ess_test_g2.h5", H5F_ACC_TRUNC);
+  h5_write(file, "g", g);
+ }
+}
diff --git a/pytriqs/wrap_test/test_g_desc.py b/pytriqs/wrap_test/test_g_desc.py
new file mode 100644
index 00000000..a192c3fd
--- /dev/null
+++ b/pytriqs/wrap_test/test_g_desc.py
@@ -0,0 +1,14 @@
+from wrap_generator import *
+
+# The module
+module = module_(full_name = "pytriqs.wrap_test.test_g", doc = " Doc of my_module ")
+module.add_include("<triqs/../pytriqs/wrap_test/g.hpp>") 
+module.add_include("<pytriqs/converters/gf.hpp>")
+
+module.add_function (name = "make_bgf", signature = "block_gf_view<imfreq> (double a)", doc = "DOC of print_a")
+module.add_function (name = "pass_bgf", signature = "void (block_gf_view<imfreq> g) ", doc = "DOC of print_a")
+
+if __name__ == '__main__' : 
+   module.generate_code(mako_template = sys.argv[1], wrap_file = sys.argv[2])
+   module.generate_py_converter_header(mako_template = sys.argv[3], wrap_file = sys.argv[4])
+
diff --git a/triqs/gfs/block.hpp b/triqs/gfs/block.hpp
index cd4ab913..cd36b724 100644
--- a/triqs/gfs/block.hpp
+++ b/triqs/gfs/block.hpp
@@ -157,9 +157,10 @@ namespace gfs {
   return {{int(V.size())}, std::move(V), nothing{}, nothing{}, nothing{}};
  }
 
- // for cython proxy only. do not document.
- template <typename GF, typename GF2> gf_view<block_index, GF> make_block_gf_view_from_vector_of_cython_proxy(std::vector<GF2> V) {
-  return {{int(V.size())}, std::move(V), nothing{}, nothing{}, nothing{}};
+ template <typename GF>
+ gf_view<block_index, typename GF::regular_type> make_block_gf_view_from_vector(std::vector<std::string> block_names,
+                                                                                std::vector<GF> V) {
+  return {{std::move(block_names)}, std::move(V), nothing{}, nothing{}, nothing{}};
  }
 
  // ------------------------------- Extend reinterpret_scalar_valued_gf_as_matrix_valued for block gf   ------
diff --git a/triqs/gfs/gf.hpp b/triqs/gfs/gf.hpp
index 3173c8aa..b703c29f 100644
--- a/triqs/gfs/gf.hpp
+++ b/triqs/gfs/gf.hpp
@@ -528,9 +528,9 @@ namespace gfs {
   gf_view(gf_impl<Variable, Target, Opt, false, false> &&g) noexcept : B(std::move(g), bool {}) {} // from a gf &&
 
   template <typename D>
-  gf_view(typename B::mesh_t const &m, D const &dat, typename B::singularity_view_t const &t, typename B::symmetry_t const &s,
+  gf_view(typename B::mesh_t const &m, D &&dat, typename B::singularity_view_t const &t, typename B::symmetry_t const &s,
           typename B::indices_t const &ind = typename B::indices_t{}, std::string name = "")
-    : B(m, factory<typename B::data_t>(dat), t, s, ind, name, typename B::evaluator_t{}) {}
+    : B(m, factory<typename B::data_t>(std::forward<D>(dat)), t, s, ind, name, typename B::evaluator_t{}) {}
 
   friend void swap(gf_view &a, gf_view &b) noexcept { a.swap_impl(b); }
 
diff --git a/triqs/python_tools/wrapper_tools.hpp b/triqs/python_tools/wrapper_tools.hpp
index 768b0d53..abba8030 100644
--- a/triqs/python_tools/wrapper_tools.hpp
+++ b/triqs/python_tools/wrapper_tools.hpp
@@ -25,7 +25,7 @@ namespace triqs { namespace py_tools {
 
 //--------------------- pyref -----------------------------
 
-// a little class to hold an owned ref, make sure it is decref at desctruction
+// a little class to hold an owned ref, make sure it is decref at destruction
 // with some useful factories.
 class pyref {
  PyObject * ob = NULL;
@@ -272,7 +272,12 @@ template <> struct py_converter<triqs::h5::group> {
 template <typename T> struct py_converter<std::vector<T>> {
  static PyObject * c2py(std::vector<T> const &v) {
   PyObject * list = PyList_New(0);
-  for (auto const & x : v) if (PyList_Append(list, py_converter<T>::c2py(x)) == -1) { Py_DECREF(list); return NULL;} // error
+  for (auto & x : v) if (PyList_Append(list, py_converter<T>::c2py(x)) == -1) { Py_DECREF(list); return NULL;} // error
+  return list;
+ }
+  static PyObject * c2py(std::vector<T> &v) {
+  PyObject * list = PyList_New(0);
+  for (auto & x : v) if (PyList_Append(list, py_converter<T>::c2py(x)) == -1) { Py_DECREF(list); return NULL;} // error
   return list;
  }
  static bool is_convertible(PyObject *ob, bool raise_exception) {
@@ -374,6 +379,7 @@ template <> struct py_converter<triqs::arrays::range> {
 };
 */
 
+
 // --- nothing  <--> None ----
 #ifdef TRIQS_GF_INCLUDED
 
@@ -392,6 +398,52 @@ template<> struct py_converter<triqs::gfs::indices_2> : py_converter_from_reduct
 template<bool B> struct py_converter<triqs::gfs::matsubara_domain<B>> : py_converter_from_reductor<triqs::gfs::matsubara_domain<B>>{};
 template<> struct py_converter<triqs::gfs::R_domain> : py_converter_from_reductor<triqs::gfs::R_domain>{};
 
+// Converter for Block gf
+template <typename... T> struct py_converter<triqs::gfs::gf_view<triqs::gfs::block_index, triqs::gfs::gf<T...>>> {
+
+ using gf_type = triqs::gfs::gf<T...>;
+ using gf_view_type = triqs::gfs::gf_view<T...>;
+ using c_type = triqs::gfs::gf_view<triqs::gfs::block_index, gf_type>;
+
+ static PyObject *c2py(c_type &&g) { return c2py(g);}
+
+ static PyObject *c2py(c_type &g) {
+  // rm the view_proxy
+  std::vector<gf_view_type> vg; 
+  vg.reserve(g.data().size());
+  for (auto const & x : g.data()) vg.push_back(x);
+  pyref v_gf = convert_to_python(vg);
+  pyref v_names = convert_to_python(g.mesh().domain().names());
+  pyref cls = pyref::module("pytriqs.gf.local").attr("BlockGf");
+  if (cls.is_null()) TRIQS_RUNTIME_ERROR <<"Can not find the pytriqs.gf.local.BlockGf";
+  pyref kw = PyDict_New();
+  PyDict_SetItemString(kw, "name_list", v_names);
+  PyDict_SetItemString(kw, "block_list", v_gf);
+  pyref empty_tuple = PyTuple_New(0);
+  return PyObject_Call(cls, empty_tuple, kw);
+ }
+
+ static bool is_convertible(PyObject *ob, bool raise_exception) {
+  pyref cls = pyref::module("pytriqs.gf.local").attr("BlockGf");
+  if (cls.is_null()) TRIQS_RUNTIME_ERROR <<"Can not find the pytriqs.gf.local.BlockGf";
+  int i = PyObject_IsInstance(ob, cls);
+  if (i == -1) { // an error has occurred
+   i = 0;
+   if (!raise_exception) PyErr_Clear();
+  }
+  if ((i == 0) && (raise_exception)) PyErr_SetString(PyExc_TypeError, "The object is not a BlockGf");
+  return i;
+ }
+
+ static c_type py2c(PyObject *ob) {
+  pyref x = borrowed(ob);
+  pyref names = x.attr("_BlockGf__indices");
+  pyref gfs = x.attr("_BlockGf__GFlist");
+  return make_block_gf_view_from_vector(convert_from_python<std::vector<std::string>>(names),
+                                        convert_from_python<std::vector<gf_view_type>>(gfs));
+ }
+};
+
 #endif
 
 // ---- function ----