Stop the _adapt_batch() from changing the batch in-place

[adityasuthar]

Pull Request

Description

The _adapt_batch() method changes the batch in place. This is bad practice. We are updating the method so that it returns a new batch without changing the old one.

Fixes #210

How Has This Been Tested?

I tested by running the python -m pytest tests command.

• Yes

If your changes affect data processing, have you plotted any changes? i.e. have you done a quick sanity check?

• Yes

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings