diff --git a/examples/ipynb/pytablewriter_examples.ipynb b/examples/ipynb/pytablewriter_examples.ipynb
index 6ab3d4c6..90fb69f8 100644
--- a/examples/ipynb/pytablewriter_examples.ipynb
+++ b/examples/ipynb/pytablewriter_examples.ipynb
@@ -69,7 +69,7 @@
     }
    ],
    "source": [
-    "for name in pytablewriter.TableWriterFactory.get_format_name_list():\n",
+    "for name in pytablewriter.TableWriterFactory.get_format_names():\n",
     "    print(name)"
    ]
   },
@@ -105,13 +105,50 @@
     }
    ],
    "source": [
-    "for name in pytablewriter.TableWriterFactory.get_extension_list():\n",
+    "for name in pytablewriter.TableWriterFactory.get_extensions():\n",
     "    print(name)"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "# zone\n",
+      "|zone_id|country_code|   zone_name    |\n",
+      "|------:|------------|----------------|\n",
+      "|      1|AD          |Europe/Andorra  |\n",
+      "|      2|AE          |Asia/Dubai      |\n",
+      "|      3|AF          |Asia/Kabul      |\n",
+      "|      4|AG          |America/Antigua |\n",
+      "|      5|AI          |America/Anguilla|\n"
+     ]
+    }
+   ],
+   "source": [
+    "from pytablewriter import MarkdownTableWriter\n",
+    "\n",
+    "writer = MarkdownTableWriter()\n",
+    "writer.table_name = \"zone\"\n",
+    "writer.headers = [\"zone_id\", \"country_code\", \"zone_name\"]\n",
+    "writer.value_matrix = [\n",
+    "    [\"1\", \"AD\", \"Europe/Andorra\"],\n",
+    "    [\"2\", \"AE\", \"Asia/Dubai\"],\n",
+    "    [\"3\", \"AF\", \"Asia/Kabul\"],\n",
+    "    [\"4\", \"AG\", \"America/Antigua\"],\n",
+    "    [\"5\", \"AI\", \"America/Anguilla\"],\n",
+    "]\n",
+    "\n",
+    "writer.write_table()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
    "metadata": {
     "scrolled": true
    },
@@ -138,7 +175,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -168,7 +205,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
@@ -193,7 +230,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
@@ -261,7 +298,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -289,7 +326,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -343,7 +380,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [
     {
@@ -367,7 +404,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
@@ -421,7 +458,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {
@@ -464,7 +501,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 14,
    "metadata": {
     "scrolled": true
    },
@@ -512,7 +549,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [
     {
@@ -554,7 +591,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 15,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
@@ -582,7 +619,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -611,7 +648,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 17,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
@@ -669,7 +706,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 18,
+   "execution_count": 19,
    "metadata": {
     "scrolled": true
    },
@@ -699,7 +736,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
@@ -726,7 +763,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 20,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -754,7 +791,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 21,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -782,7 +819,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 22,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [
     {
@@ -811,7 +848,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 23,
+   "execution_count": 24,
    "metadata": {
     "scrolled": false
    },
@@ -847,7 +884,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [
     {
@@ -878,7 +915,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 25,
+   "execution_count": 26,
    "metadata": {},
    "outputs": [
     {
@@ -907,7 +944,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 26,
+   "execution_count": 27,
    "metadata": {},
    "outputs": [
     {
@@ -931,7 +968,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 27,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [
     {
@@ -984,7 +1021,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 28,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [
     {
@@ -1029,7 +1066,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [
     {
@@ -1073,7 +1110,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 30,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [
     {
@@ -1101,7 +1138,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 31,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [
     {
@@ -1137,7 +1174,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 32,
+   "execution_count": 33,
    "metadata": {},
    "outputs": [
     {
@@ -1179,7 +1216,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 33,
+   "execution_count": 34,
    "metadata": {
     "scrolled": true
    },
@@ -1230,7 +1267,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 34,
+   "execution_count": 35,
    "metadata": {},
    "outputs": [
     {
@@ -1272,7 +1309,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 35,
+   "execution_count": 36,
    "metadata": {},
    "outputs": [
     {
@@ -1306,7 +1343,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 36,
+   "execution_count": 37,
    "metadata": {},
    "outputs": [
     {
@@ -1342,7 +1379,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 37,
+   "execution_count": 38,
    "metadata": {},
    "outputs": [
     {
diff --git a/examples/py/from_pandas_dataframe.py b/examples/py/from_pandas_dataframe.py
index 1542c311..88255b56 100644
--- a/examples/py/from_pandas_dataframe.py
+++ b/examples/py/from_pandas_dataframe.py
@@ -7,11 +7,10 @@
 
 from textwrap import dedent
 
+import pandas as pd
 import pytablewriter
 import six
 
-import pandas as pd
-
 
 df = pd.read_csv(six.StringIO(dedent("""\
     "i","f","c","if","ifc","bool","inf","nan","mix_num","time"