.nan appears in techniques_to_components_mapping.yaml file when there is no data source

[Jon Baker]

The code that is generating the techniques_to_components_mapping.yaml seems to be writing .nan when there is no data source. Perhaps these should be left blank or omitted.

[jcwilliamsATmitre]

Circling back to this, now that data sources have been integrated (https://attack.mitre.org/datasources/) using the ATT&CK in Excel (https://attack.mitre.org/resources/working-with-attack/) is probably a better way to access these mappings in a similar format 👍