Part1 (freqeuntly used)
=======================
.. toctree::
   :maxdepth: 1
   :numbered:
   :caption: Table of Contents
   :name: part1

   options/options.rst
   indexing/indexing.rst
   advanced/advanced.rst
   missing/missing.rst
   groupby/groupby.rst
   merging/merging.rst
   reshaping/reshaping.rst
   visualization/visualization.rst
   text/text.rst
   io/io.rst