cannot import name 'Dense' from 'keras.models'

This error suggests that the `Dense` module could not be imported from the `keras.models` library. This could occur due to a few reasons:

1. The `keras` library is not installed: Ensure that `keras` is installed on your system. You can install it using pip: `pip install keras`.

2. The version of `keras` is outdated: If you already have `keras` installed, the issue could be that the version is outdated. Try updating it to the latest version: `pip install keras --upgrade`.

3. Incorrect import statement: Ensure that you are importing `Dense` from the correct module. The correct import statement should be: `from keras.layers import Dense`.

4. Conflicting packages: There may be conflicting packages or versions of packages on your system. Try uninstalling and reinstalling `keras` to ensure a clean installation.