Print hostname and IP address to the log. (#131)

We are using multiple machines to do various experiments. It makes
life easier to know which experiment is running on which machine
if we also log the IP and hostname of the machine.

egs/librispeech/ASR/conformer_ctc/train.py

@@ -124,6 +124,13 @@ def get_parser():
         """,
     )
 
+    parser.add_argument(
+        "--lr-factor",
+        type=float,
+        default=5.0,
+        help="The lr_factor for Noam optimizer",
+    )
+
     return parser
 
 
@@ -182,8 +189,6 @@ def get_params() -> AttributeDict:
 
         - weight_decay:  The weight_decay for the optimizer.
 
-        - lr_factor: The lr_factor for Noam optimizer.
-
         - warm_step: The warm_step for Noam optimizer.
     """
     params = AttributeDict(
@@ -209,7 +214,6 @@ def get_params() -> AttributeDict:
             "use_double_scores": True,
             # parameters for Noam
             "weight_decay": 1e-6,
-            "lr_factor": 5.0,
             "warm_step": 80000,
             "env_info": get_env_info(),
         }

icefall/env.py

@@ -16,6 +16,7 @@
 # limitations under the License.
 
 
+import socket
 import subprocess
 import sys
 from pathlib import Path
@@ -103,4 +104,6 @@ def get_env_info() -> Dict[str, Any]:
         "icefall-path": str(Path(__file__).resolve().parent.parent),
         "k2-path": str(Path(k2.__file__).resolve()),
         "lhotse-path": str(Path(lhotse.__file__).resolve()),
+        "hostname": socket.gethostname(),
+        "IP address": socket.gethostbyname(socket.gethostname()),
     }