7 get collection force program to terminate when the desired collection is not found

[JonahWhaler]

overwrite: bool = kwargs.get("overwrite", False)
if overwrite:
    try:
        self.vdb.delete_collection(name=self.__namespace)
        # delete_collection raises InvalidCollectionException
        # if attempt to delete non-exists collection
    except (chromadb.errors.InvalidCollectionException, ValueError):
        pass  # self.__namespace is not found in the vector database
    finally:
        self.vdb.create_collection(
            name=self.__namespace, metadata={"hnsw:space": "cosine"}
        )
else:
    # Create collection if not already present
    self.vdb.get_or_create_collection(
       name=self.__namespace, metadata={"hnsw:space": "cosine"}
    )