diff --git a/python/bindings.cpp b/python/bindings.cpp
index c790538..04fdeeb 100644
--- a/python/bindings.cpp
+++ b/python/bindings.cpp
@@ -182,7 +182,12 @@ py::class_<Population, std::shared_ptr<Population>> bindPopulationClass(py::modu
         return fmt::format(msg, fmt::arg("element", Population::ELEMENT));
     };
     return py::class_<Population, std::shared_ptr<Population>>(m, clsName, docString)
-        .def(py::init<const std::string&, const std::string&, const std::string&>())
+        .def(py::init([](py::object h5_filepath, py::object csv_filepath, std::string name) {
+                 return Population(py::str(h5_filepath), py::str(csv_filepath), name);
+             }),
+             "h5_filepath"_a,
+             "csv_filepath"_a,
+             "name"_a)
         .def_property_readonly("name", &Population::name, DOC_POP(name))
         .def_property_readonly("size", &Population::size, imbueElementName(DOC_POP(size)).c_str())
         .def_property_readonly("attribute_names",
@@ -541,8 +546,11 @@ PYBIND11_MODULE(_libsonata, m) {
     bindStorageClass<NodeStorage>(m, "NodeStorage", "NodePopulation");
 
     py::class_<NodeSets>(m, "NodeSets", "NodeSets")
-        .def(py::init<const std::string&>())
-        .def_static("from_file", [](py::object path) { return NodeSets::fromFile(py::str(path)); })
+        .def(py::init<const std::string&>(), "string of NodeSets JSON"_a)
+        .def_static(
+            "from_file",
+            [](py::object path) { return NodeSets::fromFile(py::str(path)); },
+            "path"_a)
         .def_property_readonly("names", &NodeSets::names, DOC_NODESETS(names))
         .def("materialize", &NodeSets::materialize, DOC_NODESETS(materialize))
         .def("update", &NodeSets::update, "other"_a, DOC_NODESETS(update))
@@ -571,7 +579,7 @@ PYBIND11_MODULE(_libsonata, m) {
         .def_readonly("offset", &CompartmentLocation::offset, DOC_COMPARTMENTLOCATION(offset));
 
     py::class_<CompartmentSet>(m, "CompartmentSet")
-        .def(py::init<const std::string&>())
+        .def(py::init<const std::string&>(), "string of CompartmentSet JSON"_a)
         .def_property_readonly("population",
                                &CompartmentSet::population,
                                DOC_COMPARTMENTSET(population))
@@ -635,8 +643,11 @@ PYBIND11_MODULE(_libsonata, m) {
              [](const CompartmentSet& self) { return py::str(py::repr(py::cast(self))); });
 
     py::class_<CompartmentSets>(m, "CompartmentSets")
-        .def(py::init<const std::string&>())
-        .def_static("from_file", &CompartmentSets::fromFile, py::arg("path"))
+        .def(py::init<const std::string&>(), "string of CompartmentSets JSON"_a)
+        .def_static(
+            "from_file",
+            [](py::object path) { return CompartmentSets::fromFile(py::str(path)); },
+            "path"_a)
         .def("__contains__",
              &CompartmentSets::contains,
              py::arg("key"),
@@ -724,7 +735,9 @@ PYBIND11_MODULE(_libsonata, m) {
         .value("partial", CircuitConfig::ConfigStatus::partial);
 
     py::class_<CircuitConfig>(m, "CircuitConfig", "Circuit Configuration")
-        .def(py::init<const std::string&, const std::string&>())
+        .def(py::init<const std::string&, const std::string&>(),
+             "string of CircuitConfig JSON"_a,
+             "base_path"_a)
         .def_static("from_file",
                     [](py::object path) { return CircuitConfig::fromFile(py::str(path)); })
         .def_property_readonly("config_status", &CircuitConfig::getCircuitConfigStatus, "ibid")
@@ -1252,7 +1265,10 @@ PYBIND11_MODULE(_libsonata, m) {
                       &SimulationConfig::ConnectionOverride::neuromodulationStrength,
                       DOC_SIMULATIONCONFIG(ConnectionOverride, neuromodulationStrength));
 
-    simConf.def(py::init<const std::string&, const std::string&>())
+    simConf
+        .def(py::init<const std::string&, const std::string&>(),
+             "string of SimulationConfig JSON"_a,
+             "base_path"_a)
         .def_static(
             "from_file",
             [](py::object path) { return SimulationConfig::fromFile(py::str(path)); },
diff --git a/python/tests/test_population.py b/python/tests/test_population.py
index 45ac046..b26e528 100644
--- a/python/tests/test_population.py
+++ b/python/tests/test_population.py
@@ -4,17 +4,21 @@
 
 import numpy as np
 
-from libsonata import (CircuitConfig,
-                       ElementReportReader,
-                       NodeSets,
-                       NodeStorage,
-                       Selection,
-                       SimulationConfig,
-                       SomaReportReader,
-                       SonataError,
-                       SpikeReader,
-                       EdgeStorage,
-                       )
+from libsonata import (
+    CircuitConfig,
+    CompartmentSets,
+    EdgePopulation,
+    EdgeStorage,
+    ElementReportReader,
+    NodePopulation,
+    NodeSets,
+    NodeStorage,
+    Selection,
+    SimulationConfig,
+    SomaReportReader,
+    SonataError,
+    SpikeReader,
+    )
 
 
 PATH = os.path.join(os.path.dirname(os.path.realpath(__file__)),
@@ -296,3 +300,6 @@ def test_path_ctor(self):
         NodeSets.from_file(path / 'node_sets.json')
         CircuitConfig.from_file(path / 'config/circuit_config.json')
         SimulationConfig.from_file(path / 'config/simulation_config.json')
+        NodePopulation(path / 'nodes1.h5', csv_filepath="", name="nodes-A")
+        EdgePopulation(path / 'edges1.h5', csv_filepath="", name="edges-AB")
+        CompartmentSets.from_file(path / 'compartment_sets.json')