LSSTApplications  17.0+50,17.0+84,17.0+9,18.0.0+14,18.0.0+2,18.0.0+30,18.0.0+4,18.0.0+9,18.0.0-2-ge43143a+4,18.1.0-1-g0001055,18.1.0-1-g0896a44+6,18.1.0-1-g1349e88+4,18.1.0-1-g2505f39+3,18.1.0-1-g380d4d4+4,18.1.0-1-g5e4b7ea,18.1.0-1-g85f8cd4+3,18.1.0-1-g9a6769a+2,18.1.0-1-ga1a4c1a+2,18.1.0-1-gc037db8,18.1.0-1-gd55f500+1,18.1.0-1-ge10677a+3,18.1.0-10-g73b8679e+7,18.1.0-11-g311e899+3,18.1.0-12-g0d73a3591,18.1.0-12-gc95f69a+3,18.1.0-2-g000ad9a+3,18.1.0-2-g31c43f9+3,18.1.0-2-g9c63283+4,18.1.0-2-gdf0b915+4,18.1.0-2-gf03bb23,18.1.0-3-g2e29e3d+6,18.1.0-3-g52aa583+2,18.1.0-3-g9cb968e+3,18.1.0-4-gd2e8982+6,18.1.0-5-g510c42a+3,18.1.0-5-gaeab27e+4,18.1.0-6-gdda7f3e+6,18.1.0-7-g89824ecc+4,w.2019.32
LSSTDataManagementBasePackage
lsstcppimport.cc
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1 /*
2  * LSST Data Management System
3  * Copyright 2008-2016 AURA/LSST.
4  *
5  * This product includes software developed by the
6  * LSST Project (http://www.lsst.org/).
7  *
8  * This program is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the LSST License Statement and
19  * the GNU General Public License along with this program. If not,
20  * see <https://www.lsstcorp.org/LegalNotices/>.
21  */
22 
23 #include "pybind11/pybind11.h"
24 
26 
27 namespace lsst {
28 namespace base {
29 
31 public:
32  static ModuleImporter const* get() {
33  static PythonModuleImporter const instance;
34  return &instance;
35  }
36 
37 private:
39 
40 protected:
41  virtual bool _import(std::string const& name) const;
42 };
43 
45  PyObject* mod = PyImport_ImportModule(name.c_str());
46  if (mod) {
47  Py_DECREF(mod);
48  return true;
49  } else {
50  // If the Python C API call returned a null pointer, it will
51  // also have set an exception. We don't want that, because
52  // this isn't necessarily an error (that's up to the caller).
53  PyErr_Clear();
54  }
55  return false;
56 }
57 
58 void installPythonModuleImporter() { ModuleImporter::install(PythonModuleImporter::get()); }
59 }
60 } // namespace lsst::base
61 
62 namespace py = pybind11;
63 
66 }
Base class that defines an interface for importing Python modules.
void installPythonModuleImporter()
STL class.
A base class for image defects.
static ModuleImporter const * get()
Mechanism for safely importing Python modules from C++; should not be included except by its own impl...
friend void installPythonModuleImporter()
virtual bool _import(std::string const &name) const
PYBIND11_MODULE(threads, mod)
Definition: threads.cc:32
T c_str(T... args)