  This paper was prepared by the HEP Software Foundation (HSF) PyHEP Working
Group as input to the second phase of the LHCC review of High-Luminosity LHC
(HL-LHC) computing, which took place in November, 2021. It describes the
adoption of Python and data science tools in HEP, discusses the likelihood of
future scenarios, and recommendations for action by the HEP community.
