Dev2049/pypdfium2 (#4209)

thanks @jerrytigerxu for the addition!

---------

Co-authored-by: Jere Xu <jtxu2008@gmail.com>
Co-authored-by: jerrytigerxu <jere.tiger.xu@gmailc.om>

docs/modules/indexes/document_loaders/examples/pdf.ipynb

@@ -372,6 +372,44 @@
   {
    "cell_type": "code",
    "execution_count": 9,
+   "id": "483720b5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "data = loader.load()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "96351714",
+   "metadata": {},
+   "source": [
+    "# Using PyPDFium2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "003fcc1d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import PyPDFium2Loader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "46766e29",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "loader = PyPDFium2Loader(\"example_data/layout-parser-paper.pdf\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
    "id": "010d5cdd",
    "metadata": {},
    "outputs": [],
@@ -662,7 +700,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.6"
+   "version": "3.11.3"
   }
  },
  "nbformat": 4,