What is the header file used for python

Answer 1

Python header files called modules or libraries

Answer 2

Python "header files" can be called using the following syntax:
import moduleName
Here is a documentation (list) of most of (if not all) the Python3 modules.
https://docs.python.org/3/py-modindex.html
Hope this helps!

Answer 3

you generally call a header using "import". there are many header files, like @shaik mentioned. categorised as modules or libraries.