Allow passing in encoding to csv_loader (#1836)

langchain/document_loaders/csv_loader.py

@@ -31,9 +31,11 @@ class CSVLoader(BaseLoader):
         file_path: str,
         source_column: Optional[str] = None,
         csv_args: Optional[Dict] = None,
+        encoding: Optional[str] = None,
     ):
         self.file_path = file_path
         self.source_column = source_column
+        self.encoding = encoding
         if csv_args is None:
             self.csv_args = {
                 "delimiter": ",",
@@ -45,7 +47,7 @@ class CSVLoader(BaseLoader):
     def load(self) -> List[Document]:
         docs = []
 
-        with open(self.file_path, newline="") as csvfile:
+        with open(self.file_path, newline="", encoding=self.encoding) as csvfile:
             csv = DictReader(csvfile, **self.csv_args)  # type: ignore
             for i, row in enumerate(csv):
                 content = "\n".join(f"{k.strip()}: {v.strip()}" for k, v in row.items())