Just installed llama index and was trying to run the most basic program but getting an import error.

Here is how I installed it:
“`
pip llama-index

```

Here is my full source:

```
    from llama_index.core import VectorStoreIndex, SimpleDirectoryReader

    docs = SimpleDirectoryReader("data").load_data()
```

I also tried installing

 ```
    pip llama-index-core 

 ```


I tried reinstalling llama-index still get this error about a class I am not directly importing.