added: ability to pass command line parameters from python

opm/simulators/flow/python/PyBlackOilSimulator.hpp

@@ -40,7 +40,8 @@ private:
     using Simulator = Opm::GetPropType<TypeTag, Opm::Properties::Simulator>;
 
 public:
-    PyBlackOilSimulator( const std::string& deckFilename);
+    PyBlackOilSimulator(const std::string& deckFilename,
+                        const std::vector<std::string>& args);
     PyBlackOilSimulator(
         std::shared_ptr<Opm::Deck> deck,
         std::shared_ptr<Opm::EclipseState> state,
@@ -92,6 +93,7 @@ private:
     std::shared_ptr<Opm::EclipseState> eclipse_state_;
     std::shared_ptr<Opm::Schedule> schedule_;
     std::shared_ptr<Opm::SummaryConfig> summary_config_;
+    std::vector<std::string> args_;
 };
 
 } // namespace Opm::Pybind

python/simulators/PyBlackOilSimulator.cpp

@@ -52,8 +52,10 @@ flowBlackoilTpfaMainInit(int argc, char** argv, bool outputCout, bool outputFile
 namespace py = pybind11;
 
 namespace Opm::Pybind {
-PyBlackOilSimulator::PyBlackOilSimulator( const std::string &deck_filename)
+PyBlackOilSimulator::PyBlackOilSimulator(const std::string& deck_filename,
+                                         const std::vector<std::string>& args)
     : deck_filename_{deck_filename}
+    , args_{args}
 {
 }
 
@@ -231,6 +233,7 @@ int PyBlackOilSimulator::stepInit()
             this->mpi_finalize_
         );
     }
+    this->main_->setArguments(args_);
     int exit_code = EXIT_SUCCESS;
     this->flow_main_ = this->main_->initFlowBlackoil(exit_code);
     if (this->flow_main_) {
@@ -292,8 +295,10 @@ void export_PyBlackOilSimulator(py::module& m)
     using namespace Opm::Pybind::DocStrings;
 
     py::class_<PyBlackOilSimulator>(m, "BlackOilSimulator")
-        .def(py::init<const std::string&>(),
-             PyBlackOilSimulator_filename_constructor_docstring)
+        .def(py::init<const std::string&,
+                      const std::vector<std::string>&>(),
+             PyBlackOilSimulator_filename_constructor_docstring,
+             py::arg("filename"), py::arg("args") = std::vector<std::string>{})
         .def(py::init<
              std::shared_ptr<Opm::Deck>,
              std::shared_ptr<Opm::EclipseState>,

python/simulators/PyMain.hpp

@@ -34,6 +34,31 @@ class PyMain : public Main
 public:
     using Main::Main;
 
+    void setArguments(const std::vector<std::string>& args)
+    {
+        if (args.empty()) {
+            return;
+        }
+
+        // We have the two arguments previously setup
+        // (binary name and input case name) by the main
+        // class plus whichever args are in the parameter
+        // that was passed from the python side.
+        this->argc_ = 2 + args.size();
+
+        // Setup our vector of char*'s
+        argv_python_.resize(2 + args.size());
+        argv_python_[0] = argv_[0];
+        argv_python_[1] = argv_[1];
+        for (std::size_t i = 0; i < args.size(); ++i) {
+            argv_python_[i+2] = const_cast<char*>(args[i].c_str());
+        }
+
+        // Finally set the main class' argv pointer to
+        // the combined parameter list.
+        this->argv_ = argv_python_.data();
+    }
+
     using FlowMainType = FlowMain<Properties::TTag::FlowProblemTPFA>;
     // To be called from the Python interface code. Only do the
     // initialization and then return a pointer to the FlowMain
@@ -53,6 +78,9 @@ public:
             return std::unique_ptr<FlowMainType>(); // nullptr
         }
     }
+
+private:
+    std::vector<char*> argv_python_{};
 };
 
 } // namespace Opm

python/test/test_basic.py

@@ -50,7 +50,7 @@ class TestBasic(unittest.TestCase):
 
     def test_all(self):
         with pushd(self.data_dir):
-            sim = BlackOilSimulator("SPE1CASE1.DATA")
+            sim = BlackOilSimulator(args=['--linear-solver=ilu0'], filename="SPE1CASE1.DATA")
             sim.step_init()
             sim.step()
             dt = sim.get_dt()