diff --git a/forgebox/__init__.py b/forgebox/__init__.py
index 2dd5536..a070a77 100644
--- a/forgebox/__init__.py
+++ b/forgebox/__init__.py
@@ -1 +1 @@
-__version__ = "0.4.18"
+__version__ = "0.4.18.2"
diff --git a/forgebox/_nbdev.py b/forgebox/_nbdev.py
index adf7356..7ff3ce9 100644
--- a/forgebox/_nbdev.py
+++ b/forgebox/_nbdev.py
@@ -41,6 +41,7 @@
          "highlight": "06_spacy.ipynb",
          "FreeMap": "07_freemap.ipynb",
          "SingleFileLiner": "09_multiprocess.ipynb",
+         "DataFrameRowling": "09_multiprocess.ipynb",
          "Stuff": "10_loop.ipynb",
          "method4all": "10_loop.ipynb",
          "StorageCore": "10_loop.ipynb",
diff --git a/forgebox/multiproc.py b/forgebox/multiproc.py
index 15fff1a..ae64d6d 100644
--- a/forgebox/multiproc.py
+++ b/forgebox/multiproc.py
@@ -1,6 +1,6 @@
 # AUTOGENERATED! DO NOT EDIT! File to edit: nbs/09_multiprocess.ipynb (unless otherwise specified).
 
-__all__ = ['SingleFileLiner']
+__all__ = ['SingleFileLiner', 'DataFrameRowling']
 
 # Cell
 from pathlib import Path
@@ -102,4 +102,40 @@ def split_train_test(
                     f_valid.write(line)
                 else:
                     f_train.write(line)
-        return train_file_path, valid_file_path
\ No newline at end of file
+        return train_file_path, valid_file_path
+
+# Cell
+class DataFrameRowling:
+    """
+    Read dataframe row by row
+    """
+    def __init__(self, df):
+        self.df = df
+        self.restart()
+
+    def restart(self):
+        global DataFrameRowling_df
+        DataFrameRowling_df = self.df
+        global DataFrameRowling_ct
+        DataFrameRowling_ct = 0
+
+    def __repr__(self) -> str:
+        return f"DataFrameRowling:\t{len(self)} Rows"
+
+    def __len__(self):
+        return len(self.df)
+
+    def __iter__(self):
+        for i in range(len(self)):
+            yield next(self)
+
+    def __getitem__(self, idx):
+        global DataFrameRowling_df
+        return DataFrameRowling_df[DataFrameRowling_df.index[idx]]
+
+    def __next__(self):
+        global DataFrameRowling_df
+        global DataFrameRowling_ct
+        row = DataFrameRowling_df.loc[DataFrameRowling_df.index[DataFrameRowling_ct]]
+        DataFrameRowling_ct+=1
+        return row
\ No newline at end of file
diff --git a/nbs/09_multiprocess.ipynb b/nbs/09_multiprocess.ipynb
index 6e42775..49ebc19 100644
--- a/nbs/09_multiprocess.ipynb
+++ b/nbs/09_multiprocess.ipynb
@@ -164,6 +164,75 @@
     "res = Parallel(backend=\"multiprocessing\", n_jobs=6)(delayed(get_line)(i) for i in sfl)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Read dataframe row by row"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 59,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# export\n",
+    "class DataFrameRowling:\n",
+    "    \"\"\"\n",
+    "    Read dataframe row by row\n",
+    "    \"\"\"\n",
+    "    def __init__(self, df):\n",
+    "        self.df = df\n",
+    "        self.restart()\n",
+    "        \n",
+    "    def restart(self):\n",
+    "        global DataFrameRowling_df\n",
+    "        DataFrameRowling_df = self.df\n",
+    "        global DataFrameRowling_ct\n",
+    "        DataFrameRowling_ct = 0\n",
+    "\n",
+    "    def __repr__(self) -> str:\n",
+    "        return f\"DataFrameRowling:\\t{len(self)} Rows\"\n",
+    "        \n",
+    "    def __len__(self):\n",
+    "        return len(self.df)\n",
+    "    \n",
+    "    def __iter__(self):\n",
+    "        for i in range(len(self)):\n",
+    "            yield next(self)\n",
+    "            \n",
+    "    def __getitem__(self, idx):\n",
+    "        global DataFrameRowling_df\n",
+    "        return DataFrameRowling_df[DataFrameRowling_df.index[idx]]\n",
+    "            \n",
+    "    def __next__(self):\n",
+    "        global DataFrameRowling_df\n",
+    "        global DataFrameRowling_ct\n",
+    "        row = DataFrameRowling_df.loc[DataFrameRowling_df.index[DataFrameRowling_ct]]\n",
+    "        DataFrameRowling_ct+=1\n",
+    "        return row"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 56,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import pandas as pd\n",
+    "df = pd.DataFrame({\"col1\":list(range(100))})"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 57,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "res = Parallel(backend=\"multiprocessing\", n_jobs=6)(delayed(get_line)(i) for i in DataFrameRowling(df))"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
diff --git a/settings.ini b/settings.ini
index fecbddf..3baed78 100644
--- a/settings.ini
+++ b/settings.ini
@@ -7,7 +7,7 @@ author = xiaochen(ray) zhang
 author_email = b2ray2c@gmail.com
 copyright = xiaochen(ray) zhang
 branch = master
-version = 0.4.18
+version = 0.4.18.2
 min_python = 3.6
 audience = Developers
 language = English