Hi Miguel,

Thanks a lot for the great course!

Just a quick note: When using the current version of the elasticsearch Python client (9.0.0 via pip install elasticsearch), I ran into this error when calling index():

BadRequestError(400, 'media_type_header_exception', 'Invalid media-type value on headers [Content-Type, Accept]')

This is due to a stricter requirement in ES 8+??? /9+ to explicitly send "Content-Type": "application/json" headers.

Your original course code works perfectly with elasticsearch==8.11.0 and elastic-transport==8.17.1.

Thanks again for your excellent teaching!