1324 Direclty print output from print_table in python (#1325)

HenrZu · MaxBetzDLR · web-flow · commit b1843bfce381 · 2025-08-11T11:16:35.000+02:00
When calling print_table from python, the output is now direclty printed in the console per default. (Now consistent with cpp code). When adding True as first arg, we also can still return the output as a string.

Co-authored-by: MaxBetz &lt;104758467+MaxBetzDLR@users.noreply.github.com&gt;
diff --git a/pycode/examples/simulation/ode_seir_flows.py b/pycode/examples/simulation/ode_seir_flows.py
@@ -70,8 +70,8 @@ def run_ode_seir_flows_simulation():
     # Run flow simulation
     (result, flows) = simulate_flows(0, days, dt, model)
 
-    print(result.print_table(["S", "E", "I", "R"], 16, 5))
-    print(flows.print_table(["S->E", "E->I", "I->R"], 16, 5))
+    result.print_table(False, ["S", "E", "I", "R"], 16, 5)
+    flows.print_table(False, ["S->E", "E->I", "I->R"], 16, 5)
 
 
 if __name__ == "__main__":
diff --git a/pycode/memilio-simulation/memilio/simulation/bindings/utils/time_series.cpp b/pycode/memilio-simulation/memilio/simulation/bindings/utils/time_series.cpp
@@ -65,15 +65,23 @@ void bind_time_series(py::module_& m, std::string const& name)
             py::is_operator(), py::arg("index"), py::arg("v"))
         .def(
             "print_table",
-            [](const mio::TimeSeries<double>& self, const std::vector<std::string>& column_labels, size_t width,
-               size_t precision, char separator, const std::string& header_prefix) {
-                std::ostringstream oss;
-                self.print_table(oss, column_labels, width, precision, separator, header_prefix);
-                return oss.str();
+            [](const mio::TimeSeries<double>& self, bool return_string, const std::vector<std::string>& column_labels,
+               size_t width, size_t precision, char separator, const std::string& header_prefix) {
+                if (return_string) {
+                    std::ostringstream oss;
+                    self.print_table(oss, column_labels, width, precision, separator, header_prefix);
+                    return py::object(py::str(oss.str()));
+                }
+                else {
+                    self.print_table(column_labels, width, precision, separator, header_prefix);
+                    return py::object(py::none());
+                }
             },
-            py::arg("column_labels") = std::vector<std::string>{}, py::arg("width") = 16, py::arg("precision") = 5,
-            py::arg("separator") = ' ', py::arg("header_prefix") = "\n")
-
+            "Prints the TimeSeries as a formatted table. If return_string is true, the table is returned as a "
+            "string. Otherwise, it is printed to the console.",
+            py::arg("return_string") = false, py::arg("column_labels") = std::vector<std::string>{},
+            py::arg("width") = 16, py::arg("precision") = 5, py::arg("separator") = ' ',
+            py::arg("header_prefix") = "\n")
         .def(
             "export_csv",
             [](const mio::TimeSeries<double>& self, const std::string& filename,
diff --git a/pycode/memilio-simulation/memilio/simulation_test/test_time_series.py b/pycode/memilio-simulation/memilio/simulation_test/test_time_series.py
@@ -65,7 +65,7 @@ def test_print_table(self):
         ts = mio.TimeSeries(1)
         ts.add_time_point(2, np.r_[1])
         ts.add_time_point(3.5, np.r_[2])
-        output = ts.print_table(["a", "b"], 2, 2)
+        output = ts.print_table(True, ["a", "b"], 2, 2)
         self.assertEqual(
             output, '\nTime a \n2.00 1.00\n3.50 2.00\n')
 
@@ -74,10 +74,25 @@ def test_print_table_with_separator(self):
         ts = mio.TimeSeries(1)
         ts.add_time_point(2, np.r_[1])
         ts.add_time_point(3.5, np.r_[2])
-        output = ts.print_table(["a"], 4, 1, ',', "# ")
+        output = ts.print_table(True, ["a"], 4, 1, ',', "# ")
         self.assertEqual(
             output, '# Time,a   \n 2.0, 1.0\n 3.5, 2.0\n')
 
+    def test_print_table_console_output(self):
+        """Test the new print_table function that prints directly to console"""
+        ts = mio.TimeSeries(1)
+        ts.add_time_point(2, np.r_[1])
+        ts.add_time_point(3.5, np.r_[2])
+
+        # Test that print_table() without return_string parameter returns None
+        # (meaning it prints directly to console)
+        result = ts.print_table()
+        self.assertIsNone(result)
+
+        # Test that print_table() with custom parameters still prints to console
+        result = ts.print_table(False, ["Column1"], 10, 2)
+        self.assertIsNone(result)
+
     def test_export_csv(self):
         """Test export_csv functionality"""
 
