add config init function, save to experiment's model root.

experiments/svhn_mnist.py

@@ -61,6 +61,12 @@ class Config(object):
     momentum = 0.9
     weight_decay = 1e-6
 
+    def __init__(self):
+        public_props = (name for name in dir(self) if not name.startswith('_'))
+        with open(self.config, 'w') as f:
+            for name in public_props:
+                f.write(name + ': ' + str(getattr(self, name)) + '\n')
+
 params = Config()
 logger = SummaryWriter(params.model_root)
 device = torch.device("cuda:" + params.gpu_id if torch.cuda.is_available() else "cpu")