Print volume limitation log

qlib/config.py

@@ -273,7 +273,24 @@ class QlibConfig(Config):
         else:
             raise NotImplementedError(f"This type of uri is not supported")
 
-    def set(self, default_conf="client", **kwargs):
+    def set(self, default_conf: str = "client", **kwargs):
+        """
+        configure qlib based on the input parameters
+
+        The configure will act like a dictionary.
+
+        Normally, it literally replace the value according to the keys.
+        However, sometimes it is hard for users to set the config when the configure is nested and complicated
+
+        So this API provides some special parameters for users to set the keys in a more convenient way.
+        - region:  REG_CN, REG_US
+            - several region-related config will be changed
+
+        Parameters
+        ----------
+        default_conf : str
+            the default config template chosen by user: "server", "client"
+        """
         from .utils import set_log_with_config, get_module_logger, can_use_cache
 
         self.reset()