diff --git a/federatedscope/autotune/run.py b/federatedscope/autotune/run.py
index 61a931859..bdb2d27b6 100644
--- a/federatedscope/autotune/run.py
+++ b/federatedscope/autotune/run.py
@@ -1,4 +1,13 @@
 def run_scheduler(scheduler, cfg, client_cfgs=None):
+    """
+    This function is to optimize FedHPO problem by scheduler. The method is
+    decided by  `cfg.hpo.scheduler`.
+    Args:
+        scheduler: Scheduler for conducting serval FS runs, \
+            see ``federatedscope.autotune.algos.Scheduler``
+        cfg: The configurations of the FL course.
+        client_cfgs: The clients' configurations.
+    """
     if cfg.hpo.scheduler in ['sha', 'wrap_sha']:
         _ = scheduler.optimize()
     elif cfg.hpo.scheduler in [
diff --git a/federatedscope/autotune/smac.py b/federatedscope/autotune/smac.py
index 350ded436..067f53147 100644
--- a/federatedscope/autotune/smac.py
+++ b/federatedscope/autotune/smac.py
@@ -15,6 +15,14 @@ def run_smac(cfg, scheduler, client_cfgs=None):
     perfs = []
 
     def optimization_function_wrapper(config):
+        """
+        Used as an evaluation function for SMAC optimizer.
+        Args:
+            config: configurations of FS run.
+
+        Returns:
+            Best results of server of specific FS run.
+        """
         budget = cfg.hpo.sha.budgets[-1]
         results = eval_in_fs(cfg, config, budget, client_cfgs)
         key1, key2 = cfg.hpo.metric.split('.')
diff --git a/federatedscope/core/feature/vfl/preprocess/instance_norm.py b/federatedscope/core/feature/vfl/preprocess/instance_norm.py
index a38d10948..1d6779d01 100644
--- a/federatedscope/core/feature/vfl/preprocess/instance_norm.py
+++ b/federatedscope/core/feature/vfl/preprocess/instance_norm.py
@@ -10,7 +10,7 @@
 
 def wrap_instance_norm_server(worker):
     """
-    This function is to perform instance norm vfl tabular data for server.
+    This function is to perform instance norm on vfl tabular data for server.
     Args:
         worker: ``federatedscope.core.workers.Worker`` to be wrapped