Logging from python, e.g. for lower log level on multi-GPU workers

Author: cypof

python/caffe/__init__.py

@@ -1,5 +1,5 @@
 from .pycaffe import Net, SGDSolver, NesterovSolver, AdaGradSolver, RMSPropSolver, AdaDeltaSolver, AdamSolver
-from ._caffe import set_mode_cpu, set_mode_gpu, set_device, Layer, get_solver, layer_type_list, set_random_seed
+from ._caffe import init_log, log, set_mode_cpu, set_mode_gpu, set_device, Layer, get_solver, layer_type_list, set_random_seed
 from ._caffe import __version__
 from .proto.caffe_pb2 import TRAIN, TEST
 from .classifier import Classifier

python/caffe/_caffe.cpp

@@ -51,6 +51,19 @@ const int NPY_DTYPE = NPY_FLOAT32;
 void set_mode_cpu() { Caffe::set_mode(Caffe::CPU); }
 void set_mode_gpu() { Caffe::set_mode(Caffe::GPU); }
 
+void InitLog(int level) {
+  FLAGS_logtostderr = 1;
+  FLAGS_minloglevel = level;
+  ::google::InitGoogleLogging("");
+  ::google::InstallFailureSignalHandler();
+}
+void InitLogInfo() {
+  InitLog(google::INFO);
+}
+void Log(const string& s) {
+  LOG(INFO) << s;
+}
+
 void set_random_seed(unsigned int seed) { Caffe::set_random_seed(seed); }
 
 // For convenience, check that input files can be opened, and raise an
@@ -283,6 +296,9 @@ BOOST_PYTHON_MODULE(_caffe) {
   bp::scope().attr("__version__") = AS_STRING(CAFFE_VERSION);
 
   // Caffe utility functions
+  bp::def("init_log", &InitLog);
+  bp::def("init_log", &InitLogInfo);
+  bp::def("log", &Log);
   bp::def("set_mode_cpu", &set_mode_cpu);
   bp::def("set_mode_gpu", &set_mode_gpu);
   bp::def("set_random_seed", &set_random_seed);