diff --git a/src/Particle/ParticleContainer.H b/src/Particle/ParticleContainer.H
index 887ad72b..5dfcdc36 100644
--- a/src/Particle/ParticleContainer.H
+++ b/src/Particle/ParticleContainer.H
@@ -192,13 +192,13 @@ void make_ParticleContainer_and_Iterators (py::module &m, std::string allocstr)
         .def_property_readonly_static("NArrayReal", [](const py::object&){return ParticleContainerType::NArrayReal; })
         .def_property_readonly_static("NArrayInt", [](const py::object&){return ParticleContainerType::NArrayInt; })
 
-        .def_property_readonly("NumRealComps", &ParticleContainerType::NumRealComps,
+        .def_property_readonly("num_real_comps", &ParticleContainerType::NumRealComps,
             "The number of compile-time and runtime Real components in SoA")
-        .def_property_readonly("NumIntComps", &ParticleContainerType::NumIntComps,
+        .def_property_readonly("num_int_comps", &ParticleContainerType::NumIntComps,
             "The number of compile-time and runtime int components in SoA")
-        .def_property_readonly("NumRuntimeRealComps", &ParticleContainerType::NumRuntimeRealComps,
+        .def_property_readonly("num_runtime_real_comps", &ParticleContainerType::NumRuntimeRealComps,
             "The number of runtime Real components in SoA")
-        .def_property_readonly("NumRuntimeIntComps", &ParticleContainerType::NumRuntimeIntComps,
+        .def_property_readonly("num_runtime_int_comps", &ParticleContainerType::NumRuntimeIntComps,
             "The number of runtime Int components in SoA")
 
         .def_property_readonly("finest_level", &ParticleContainerBase::finestLevel)
@@ -231,8 +231,8 @@ void make_ParticleContainer_and_Iterators (py::module &m, std::string allocstr)
 
         .def("numLocalTilesAtLevel", &ParticleContainerType::numLocalTilesAtLevel)
 
-        .def("reserveData", &ParticleContainerType::reserveData)
-        .def("resizeData", &ParticleContainerType::resizeData)
+        .def("reserve_data", &ParticleContainerType::reserveData)
+        .def("resize_data", &ParticleContainerType::resizeData)
 
         // void InitFromAsciiFile (const std::string& file, int extradata,
         //                         const IntVect* Nrep = nullptr);
diff --git a/src/Particle/StructOfArrays.cpp b/src/Particle/StructOfArrays.cpp
index c26ad19c..9b8ba9ae 100644
--- a/src/Particle/StructOfArrays.cpp
+++ b/src/Particle/StructOfArrays.cpp
@@ -24,9 +24,9 @@ void make_StructOfArrays(py::module &m, std::string allocstr)
     py::class_<SOAType>(m, soa_name.c_str())
         .def(py::init())
         .def("define", &SOAType::define)
-        .def("NumRealComps", &SOAType::NumRealComps,
+        .def_property_readonly("num_real_comps", &SOAType::NumRealComps,
              "Get the number of compile-time + runtime Real components")
-        .def("NumIntComps", &SOAType::NumIntComps,
+        .def_property_readonly("num_int_comps", &SOAType::NumIntComps,
              "Get the number of compile-time + runtime Int components")
 
         // compile-time components
diff --git a/src/amrex/StructOfArrays.py b/src/amrex/StructOfArrays.py
index f007909c..c22a90e1 100644
--- a/src/amrex/StructOfArrays.py
+++ b/src/amrex/StructOfArrays.py
@@ -32,10 +32,10 @@ def soa_to_numpy(self, copy=False):
     if self.size() == 0:
         raise ValueError("SoA is empty.")
 
-    for idx_real in range(self.NumRealComps()):
+    for idx_real in range(self.num_real_comps):
         soa_view.real.append(self.GetRealData(idx_real).to_numpy(copy=copy))
 
-    for idx_int in range(self.NumIntComps()):
+    for idx_int in range(self.num_int_comps):
         soa_view.int.append(self.GetIntData(idx_int).to_numpy(copy=copy))
 
     return soa_view
@@ -70,10 +70,10 @@ def soa_to_cupy(self, copy=False):
     if self.size() == 0:
         raise ValueError("SoA is empty.")
 
-    for idx_real in range(self.NumRealComps()):
+    for idx_real in range(self.num_real_comps):
         soa_view.real.append(self.GetRealData(idx_real).to_cupy(copy=copy))
 
-    for idx_int in range(self.NumIntComps()):
+    for idx_int in range(self.num_int_comps):
         soa_view.int.append(self.GetIntData(idx_int).to_cupy(copy=copy))
 
     return soa_view
diff --git a/tests/test_particleContainer.py b/tests/test_particleContainer.py
index 9f1897e4..f4ef1423 100644
--- a/tests/test_particleContainer.py
+++ b/tests/test_particleContainer.py
@@ -129,7 +129,7 @@ def test_pc_init():
     # lvl = 0
     for lvl in range(pc.finest_level + 1):
         print(f"at level {lvl}:")
-        for pti in amr.ParIter_1_1_2_1_default(pc, level=lvl):
+        for pti in pc.iterator(pc, level=lvl):
             print("...")
             assert pti.num_particles == 1
             assert pti.num_real_particles == 1
@@ -158,7 +158,7 @@ def test_pc_init():
 
     # read-only
     for lvl in range(pc.finest_level + 1):
-        for pti in amr.ParConstIter_1_1_2_1_default(pc, level=lvl):
+        for pti in pc.const_iterator(pc, level=lvl):
             assert pti.num_particles == 1
             assert pti.num_real_particles == 1
             assert pti.num_neighbor_particles == 0
diff --git a/tests/test_soa.py b/tests/test_soa.py
index 24c6911f..0edaaf78 100644
--- a/tests/test_soa.py
+++ b/tests/test_soa.py
@@ -8,15 +8,15 @@
 def test_soa_init():
     soa = amr.StructOfArrays_2_1_default()
     print("--test init --")
-    print("num real components", soa.NumRealComps())
-    print("num int components", soa.NumIntComps())
-    assert soa.NumRealComps() == 2 and soa.NumIntComps() == 1
+    print("num real components", soa.num_real_comps)
+    print("num int components", soa.num_int_comps)
+    assert soa.num_real_comps == 2 and soa.num_int_comps == 1
 
     soa.define(1, 3)
     print("--test define --")
-    print("num real components", soa.NumRealComps())
-    print("num int components", soa.NumIntComps())
-    assert soa.NumRealComps() == 3 and soa.NumIntComps() == 4
+    print("num real components", soa.num_real_comps)
+    print("num int components", soa.num_int_comps)
+    assert soa.num_real_comps == 3 and soa.num_int_comps == 4
     print("num particles", soa.numParticles())
     print("num real particles", soa.numRealParticles())
     print("num totalparticles", soa.numTotalParticles())