init python part (#7)

python/util/setup_logging.py

@@ -0,0 +1,36 @@
+import json
+import logging.config
+import os
+
+
+def log_dir():
+    fnm = os.path.join(os.path.dirname(__file__), '../log/')
+    if not os.path.exists(fnm):
+        fnm = os.path.join(os.path.dirname(__file__), '../../log/')
+    assert os.path.exists(fnm), f"Can't locate log dir: {fnm}"
+    return fnm
+
+
+def setup_logging(default_path="conf/logging.json",
+                  default_level=logging.INFO,
+                  env_key="LOG_CFG"):
+    path = default_path
+    value = os.getenv(env_key, None)
+    if value:
+        path = value
+    if os.path.exists(path):
+        with open(path, "r") as f:
+            config = json.load(f)
+            fnm = log_dir()
+
+            config["handlers"]["info_file_handler"]["filename"] = fnm + "info.log"
+            config["handlers"]["error_file_handler"]["filename"] = fnm + "error.log"
+            logging.config.dictConfig(config)
+    else:
+        logging.basicConfig(level=default_level)
+
+
+__fnm = os.path.join(os.path.dirname(__file__), 'conf/logging.json')
+if not os.path.exists(__fnm):
+    __fnm = os.path.join(os.path.dirname(__file__), '../../conf/logging.json')
+setup_logging(__fnm)