File: missing_intro.rst

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pandas 2.3.1%2Bdfsg-1
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pandas represents missing data with the special float value ``NaN`` (not a number).  Many of the
semantics are the same; for example missing data propagates through numeric operations, and is
ignored by default for aggregations.

.. ipython:: python

   outer_join
   outer_join["value_x"] + outer_join["value_y"]
   outer_join["value_x"].sum()