diff --git a/src/systemc/core/python.cc b/src/systemc/core/python.cc
index 2283ae7..472a050 100644
--- a/src/systemc/core/python.cc
+++ b/src/systemc/core/python.cc
@@ -45,20 +45,31 @@
     return first;
 }
 
+bool python_initialized = false;
+
 void
 systemc_pybind(pybind11::module_ &m_internal)
 {
     pybind11::module_ m = m_internal.def_submodule("systemc");
     for (auto ptr = firstInitFunc(); ptr; ptr = ptr->next)
-        ptr->run(m);
+        ptr->callback(m);
+
+    python_initialized = true;
 }
 gem5::EmbeddedPyBind embed_("systemc", &systemc_pybind);
 
 } // anonymous namespace
 
-PythonInitFunc::PythonInitFunc() : next(firstInitFunc())
+PythonInitFunc::PythonInitFunc(Callback run) :
+    callback(run), next(firstInitFunc())
 {
     firstInitFunc() = this;
+
+    // If the python was already initialized, run the callback immediately.
+    if (python_initialized) {
+        auto systemc_module = pybind11::module_::import("_m5.systemc");
+        callback(systemc_module);
+    }
 }
 
 } // namespace sc_gem5
diff --git a/src/systemc/core/python.hh b/src/systemc/core/python.hh
index 5a3f6ef..3c563db 100644
--- a/src/systemc/core/python.hh
+++ b/src/systemc/core/python.hh
@@ -35,11 +35,12 @@
 
 struct PythonInitFunc
 {
+    using Callback = void(*)(pybind11::module_ &systemc);
+    Callback callback;
+
     PythonInitFunc *next;
 
-    PythonInitFunc();
-    ~PythonInitFunc() {}
-    virtual void run(pybind11::module_ &systemc) = 0;
+    PythonInitFunc(Callback run);
 };
 
 } // namespace sc_gem5
diff --git a/src/systemc/core/sc_main_python.cc b/src/systemc/core/sc_main_python.cc
index 1697efe..8d2542e 100644
--- a/src/systemc/core/sc_main_python.cc
+++ b/src/systemc/core/sc_main_python.cc
@@ -92,15 +92,10 @@
 // Make our sc_main wrapper available in the internal _m5 python module under
 // the systemc submodule.
 
-struct InstallScMain : public ::sc_gem5::PythonInitFunc
-{
-    void
-    run(pybind11::module_ &systemc) override
-    {
-        systemc.def("sc_main", &sc_main);
-        systemc.def("sc_main_result_code", &sc_main_result_code);
-        systemc.def("sc_main_result_str", &sc_main_result_str);
-    }
-} installScMain;
+::sc_gem5::PythonInitFunc installScMain([](pybind11::module_ &systemc) {
+    systemc.def("sc_main", &sc_main);
+    systemc.def("sc_main_result_code", &sc_main_result_code);
+    systemc.def("sc_main_result_str", &sc_main_result_str);
+});
 
 } // anonymous namespace
diff --git a/src/systemc/core/sc_time_python.cc b/src/systemc/core/sc_time_python.cc
index 58fa65f..be383bc 100644
--- a/src/systemc/core/sc_time_python.cc
+++ b/src/systemc/core/sc_time_python.cc
@@ -33,48 +33,43 @@
 namespace
 {
 
-struct InstallScTime : public ::sc_gem5::PythonInitFunc
-{
-    void
-    run(pybind11::module_ &systemc) override
-    {
-        pybind11::class_<sc_core::sc_time> sc_time(systemc, "sc_time");
-        sc_time
-            // Constructors (omitting nonstandard and deprecated)
-            .def(pybind11::init<>())
-            .def(pybind11::init<double, sc_core::sc_time_unit>())
-            .def(pybind11::init<const sc_core::sc_time &>())
+::sc_gem5::PythonInitFunc installScTime([](pybind11::module_ &systemc) {
+    pybind11::class_<sc_core::sc_time> sc_time(systemc, "sc_time");
+    sc_time
+        // Constructors (omitting nonstandard and deprecated)
+        .def(pybind11::init<>())
+        .def(pybind11::init<double, sc_core::sc_time_unit>())
+        .def(pybind11::init<const sc_core::sc_time &>())
 
-            // Converters.
-            .def("value", &sc_core::sc_time::value)
-            .def("to_double", &sc_core::sc_time::to_double)
-            .def("to_seconds", &sc_core::sc_time::to_seconds)
-            .def("to_string", &sc_core::sc_time::to_string)
-            .def("__str__", &sc_core::sc_time::to_string)
+        // Converters.
+        .def("value", &sc_core::sc_time::value)
+        .def("to_double", &sc_core::sc_time::to_double)
+        .def("to_seconds", &sc_core::sc_time::to_seconds)
+        .def("to_string", &sc_core::sc_time::to_string)
+        .def("__str__", &sc_core::sc_time::to_string)
 
-            // Operators.
-            .def(pybind11::self == pybind11::self)
-            .def(pybind11::self != pybind11::self)
-            .def(pybind11::self < pybind11::self)
-            .def(pybind11::self <= pybind11::self)
-            .def(pybind11::self > pybind11::self)
-            .def(pybind11::self >= pybind11::self)
-            .def(pybind11::self += pybind11::self)
-            .def(pybind11::self -= pybind11::self)
-            .def(pybind11::self *= double())
-            .def(pybind11::self /= double())
-            ;
+        // Operators.
+        .def(pybind11::self == pybind11::self)
+        .def(pybind11::self != pybind11::self)
+        .def(pybind11::self < pybind11::self)
+        .def(pybind11::self <= pybind11::self)
+        .def(pybind11::self > pybind11::self)
+        .def(pybind11::self >= pybind11::self)
+        .def(pybind11::self += pybind11::self)
+        .def(pybind11::self -= pybind11::self)
+        .def(pybind11::self *= double())
+        .def(pybind11::self /= double())
+        ;
 
-        pybind11::enum_<sc_core::sc_time_unit>(sc_time, "sc_time_unit")
-            .value("SC_FS", sc_core::SC_FS)
-            .value("SC_PS", sc_core::SC_PS)
-            .value("SC_NS", sc_core::SC_NS)
-            .value("SC_US", sc_core::SC_US)
-            .value("SC_MS", sc_core::SC_MS)
-            .value("SC_SEC", sc_core::SC_SEC)
-            .export_values()
-            ;
-    }
-} installScTime;
+    pybind11::enum_<sc_core::sc_time_unit>(sc_time, "sc_time_unit")
+        .value("SC_FS", sc_core::SC_FS)
+        .value("SC_PS", sc_core::SC_PS)
+        .value("SC_NS", sc_core::SC_NS)
+        .value("SC_US", sc_core::SC_US)
+        .value("SC_MS", sc_core::SC_MS)
+        .value("SC_SEC", sc_core::SC_SEC)
+        .export_values()
+        ;
+});
 
 } // anonymous namespace
diff --git a/src/systemc/tlm_core/2/quantum/global_quantum_python.cc b/src/systemc/tlm_core/2/quantum/global_quantum_python.cc
index c29a232..a00db0c 100644
--- a/src/systemc/tlm_core/2/quantum/global_quantum_python.cc
+++ b/src/systemc/tlm_core/2/quantum/global_quantum_python.cc
@@ -31,21 +31,17 @@
 namespace
 {
 
-struct InstallTlmGlobalQuantum : public ::sc_gem5::PythonInitFunc
-{
-    void
-    run(pybind11::module_ &systemc) override
-    {
-        pybind11::class_<tlm::tlm_global_quantum>(
-                systemc, "tlm_global_quantum")
-            .def_static("instance", &tlm::tlm_global_quantum::instance,
-                        pybind11::return_value_policy::reference)
-            .def("set", &tlm::tlm_global_quantum::set)
-            .def("get", &tlm::tlm_global_quantum::get)
-            .def("compute_local_quantum",
-                    &tlm::tlm_global_quantum::compute_local_quantum)
-            ;
-    }
-} installTlmGlobalQuantum;
+::sc_gem5::PythonInitFunc installTlmGlobalQuantum(
+        [](pybind11::module_ &systemc) {
+    pybind11::class_<tlm::tlm_global_quantum>(
+            systemc, "tlm_global_quantum")
+        .def_static("instance", &tlm::tlm_global_quantum::instance,
+                    pybind11::return_value_policy::reference)
+        .def("set", &tlm::tlm_global_quantum::set)
+        .def("get", &tlm::tlm_global_quantum::get)
+        .def("compute_local_quantum",
+                &tlm::tlm_global_quantum::compute_local_quantum)
+        ;
+});
 
 } // anonymous namespace