Data APIs - when is it required

@Tradehull_Imran Hi Imran
Greetings, Your videos on Python are very nice, thank you.
If we don’t have Data APIs subscription, will we be not able to learn Python or do excersices that you have shown in the videos.
Is Data API needed only for Dhan_websocket.py to get data in excel or even to run
Dhan_codebase_usage.py , Dhan_Tradehull.py files.
Can you please clarify.
Thanks
Vinay