From c6b67cb8fe89fbe71759f0a91f2cf229625f7cd1 Mon Sep 17 00:00:00 2001
From: bxdd <bxddream@gmail.com>
Date: Mon, 22 Mar 2021 18:37:13 +0800
Subject: [PATCH 1/3] fix doc

---
 docs/component/data.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/component/data.rst b/docs/component/data.rst
index ba7979e23e..89cc918c11 100644
--- a/docs/component/data.rst
+++ b/docs/component/data.rst
@@ -298,9 +298,9 @@ Here are some important interfaces that ``DataHandlerLP`` provides:
 .. autoclass:: qlib.data.dataset.handler.DataHandlerLP
     :members: __init__, fetch, get_cols
 
-If users want to load features and labels by config, users can inherit ``qlib.data.dataset.handler.ConfigDataHandler``, ``Qlib`` also provides some preprocess method in this subclass.
+If users want to load features and labels by config, users can define a new handler and call the static method `parse_config_to_fields` of ``qlib.contrib.data.handler.Alpha158``.
 
-If users want to use qlib data, `QLibDataHandler` is recommended. Users can inherit their custom class from `QLibDataHandler`, which is also a subclass of `ConfigDataHandler`.
+Also, users can pass ``qlib.contrib.data.processor.ConfigSectionProcessor`` that provides some preprocess method for features defined by config into the new handler.
 
 
 Processor
@@ -337,7 +337,6 @@ Qlib provides implemented data handler `Alpha158`. The following example shows h
 
 .. note:: Users need to initialize ``Qlib`` with `qlib.init` first, please refer to `initialization <../start/initialization.html>`_.
 
-
 .. code-block:: Python
 
     import qlib
@@ -364,6 +363,7 @@ Qlib provides implemented data handler `Alpha158`. The following example shows h
         # fetch all the features
         print(h.fetch(col_set="feature"))
 
+
 API
 ---------
 

From 7370d5af9e7f6d24fba90597a3e3097e21820c1a Mon Sep 17 00:00:00 2001
From: bxdd <bxddream@gmail.com>
Date: Mon, 22 Mar 2021 18:37:44 +0800
Subject: [PATCH 2/3] add label doc

---
 docs/component/data.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/component/data.rst b/docs/component/data.rst
index 89cc918c11..ce639d8fa9 100644
--- a/docs/component/data.rst
+++ b/docs/component/data.rst
@@ -363,6 +363,7 @@ Qlib provides implemented data handler `Alpha158`. The following example shows h
         # fetch all the features
         print(h.fetch(col_set="feature"))
 
+..note :: In the ``Alpha158``, ``Qlib`` use the label `Ref($close, -2)/Ref($close, -1) - 1` that means the change from T+1 to T+2, rather than `Ref($close, -1)/$close - 1`, of which the reason is that when getting the T day close price of a china stock, the stock can be bought on T+1 day and sold on T+2 day.
 
 API
 ---------

From 4b56a4e907ae956995aaa8badc616c592d4d1b7c Mon Sep 17 00:00:00 2001
From: bxdd <bxddream@gmail.com>
Date: Mon, 22 Mar 2021 18:45:27 +0800
Subject: [PATCH 3/3] fix  doc

---
 docs/component/data.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/component/data.rst b/docs/component/data.rst
index ce639d8fa9..26f44a0761 100644
--- a/docs/component/data.rst
+++ b/docs/component/data.rst
@@ -298,9 +298,10 @@ Here are some important interfaces that ``DataHandlerLP`` provides:
 .. autoclass:: qlib.data.dataset.handler.DataHandlerLP
     :members: __init__, fetch, get_cols
 
+
 If users want to load features and labels by config, users can define a new handler and call the static method `parse_config_to_fields` of ``qlib.contrib.data.handler.Alpha158``.
 
-Also, users can pass ``qlib.contrib.data.processor.ConfigSectionProcessor`` that provides some preprocess method for features defined by config into the new handler.
+Also, users can pass ``qlib.contrib.data.processor.ConfigSectionProcessor`` that provides some preprocess methods for features defined by config into the new handler.
 
 
 Processor
@@ -363,7 +364,8 @@ Qlib provides implemented data handler `Alpha158`. The following example shows h
         # fetch all the features
         print(h.fetch(col_set="feature"))
 
-..note :: In the ``Alpha158``, ``Qlib`` use the label `Ref($close, -2)/Ref($close, -1) - 1` that means the change from T+1 to T+2, rather than `Ref($close, -1)/$close - 1`, of which the reason is that when getting the T day close price of a china stock, the stock can be bought on T+1 day and sold on T+2 day.
+
+.. note:: In the ``Alpha158``, ``Qlib`` uses the label `Ref($close, -2)/Ref($close, -1) - 1` that means the change from T+1 to T+2, rather than `Ref($close, -1)/$close - 1`, of which the reason is that when getting the T day close price of a china stock, the stock can be bought on T+1 day and sold on T+2 day.
 
 API
 ---------