Improved documentation for ClusterFile on the python side (#201)

- Fixed CI job not doing python docs
- added more docs on cluster file 
- fixed generating docs on cluster vector

python/aare/ClusterFinder.py

@@ -70,6 +70,17 @@ def ClusterFile(fname, cluster_size=(3,3), dtype=np.int32, chunk_size = 1000):
     """
     Factory function to create a ClusterFile object. Provides a cleaner syntax for
     the templated ClusterFile in C++.
+
+    .. code-block:: python
+
+        from aare import ClusterFile
+        
+        with ClusterFile("clusters.clust", cluster_size=(3,3), dtype=np.int32) as cf:
+            # cf is now a ClusterFile_Cluster3x3i object but you don't need to know that.
+            for clusters in cf:
+                # Loop over clusters in chunks of 1000 
+                # The type of clusters will be a ClusterVector_Cluster3x3i in this case
+
     """
 
     cls = _get_class("ClusterFile", cluster_size, dtype)

python/src/bind_ClusterFile.hpp

@@ -38,19 +38,20 @@ void define_ClusterFile(py::module &m, const std::string &typestr) {
                     self.read_clusters(n_clusters));
                 return v;
             },
-            py::return_value_policy::take_ownership)
+            py::return_value_policy::take_ownership, py::arg("n_clusters"))
         .def("read_frame",
              [](ClusterFile<ClusterType> &self) {
                  auto v = new ClusterVector<ClusterType>(self.read_frame());
                  return v;
              })
-        .def("set_roi", &ClusterFile<ClusterType>::set_roi)
+        .def("set_roi", &ClusterFile<ClusterType>::set_roi,
+             py::arg("roi"))
         .def(
             "set_noise_map",
             [](ClusterFile<ClusterType> &self, py::array_t<int32_t> noise_map) {
                 auto view = make_view_2d(noise_map);
                 self.set_noise_map(view);
-            })
+            }, py::arg("noise_map"))
 
         .def("set_gain_map",
              [](ClusterFile<ClusterType> &self, py::array_t<double> gain_map) {