* Adding as_frame kwarg to fetch_20newsgroups_vectorized
* Using SparseArray to store the data
* Adding changelog
* Adding pandas version dependency, and more tests
* DOC: rephrasing changelog [skip ci]
* iter
* fix
* update whats new
* apply some suggestions
* Apply suggestions from code review
Co-authored-by: Juan Carlos Alfaro Jiménez <JuanCarlos.Alfaro@uclm.es>
* review
* iter
* iter
* improve test
* TST handle the case that the pickle file is outdated
* iter
* skip if no network
* use fixture available
* address adrin comments
Co-authored-by: Brigitta Sipocz <bsipocz@gmail.com>
Co-authored-by: Juan Carlos Alfaro Jiménez <JuanCarlos.Alfaro@uclm.es>