[pdal-commits] [PDAL/PDAL] 653947: Python filter doc (#2879)

[Jules Robichaud-Gagnon]

  Branch: refs/heads/master
  Home:   https://github.com/PDAL/PDAL
  Commit: 653947042c73b0d7cbe28c5e3c5e6c9630a46748
      https://github.com/PDAL/PDAL/commit/653947042c73b0d7cbe28c5e3c5e6c9630a46748
  Author: Jules Robichaud-Gagnon <j.robichaudg at gmail.com>
  Date:   2020-01-22 (Wed, 22 Jan 2020)

  Changed paths:
    M doc/stages/filters.python.rst

  Log Message:
  -----------
  Python filter doc (#2879)

* Add a warning to remember numpy needs to be installed

* Use appropriate key for file name

* Fix some code indent issues