Harrison/rtd loader (#1513)

Co-authored-by: Youssef A. Abukwaik <yousseb@users.noreply.github.com>
langchain-ai · Mar 8, 2023 · a4a2d79 · a4a2d79
1 parent 8f21605
commit a4a2d79
Showing 1 changed file with 29 additions and 4 deletions.
diff --git a/langchain/document_loaders/readthedocs.py b/langchain/document_loaders/readthedocs.py
@@ -1,6 +1,6 @@
 """Loader that loads ReadTheDocs documentation directory dump."""
 from pathlib import Path
-from typing import List
+from typing import Any, List, Optional
 
 from langchain.docstore.document import Document
 from langchain.document_loaders.base import BaseLoader
@@ -9,16 +9,41 @@
 class ReadTheDocsLoader(BaseLoader):
     """Loader that loads ReadTheDocs documentation directory dump."""
 
-    def __init__(self, path: str):
+    def __init__(
+        self,
+        path: str,
+        encoding: Optional[str] = None,
+        errors: Optional[str] = None,
+        **kwargs: Optional[Any]
+    ):
         """Initialize path."""
+        try:
+            from bs4 import BeautifulSoup
+
+        except ImportError:
+            raise ValueError(
+                "Could not import python packages. "
+                "Please install it with `pip install beautifulsoup4`. "
+            )
+
+        try:
+            _ = BeautifulSoup(
+                "<html><body>Parser builder library test.</body></html>", **kwargs
+            )
+        except Exception as e:
+            raise ValueError("Parsing kwargs do not appear valid") from e
+
         self.file_path = path
+        self.encoding = encoding
+        self.errors = errors
+        self.bs_kwargs = kwargs
 
     def load(self) -> List[Document]:
         """Load documents."""
         from bs4 import BeautifulSoup
 
         def _clean_data(data: str) -> str:
-            soup = BeautifulSoup(data)
+            soup = BeautifulSoup(data, **self.bs_kwargs)
             text = soup.find_all("main", {"id": "main-content"})
             if len(text) != 0:
                 text = text[0].get_text()
@@ -30,7 +55,7 @@ def _clean_data(data: str) -> str:
         for p in Path(self.file_path).rglob("*"):
             if p.is_dir():
                 continue
-            with open(p) as f:
+            with open(p, encoding=self.encoding, errors=self.errors) as f:
                 text = _clean_data(f.read())
             metadata = {"source": str(p)}
             docs.append(Document(page_content=text, metadata=metadata))