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DOC: Add note regarding 0-len string to default NA values in IO docs #10965

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Sep 2, 2015
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DOC: Add note regarding 0-len string to default NA values in IO docs #10965

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4 changes: 3 additions & 1 deletion doc/source/io.rst
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Expand Up @@ -731,7 +731,9 @@ the corresponding equivalent values will also imply a missing value (in this cas

To completely override the default values that are recognized as missing, specify ``keep_default_na=False``.
The default ``NaN`` recognized values are ``['-1.#IND', '1.#QNAN', '1.#IND', '-1.#QNAN', '#N/A','N/A', 'NA',
'#NA', 'NULL', 'NaN', '-NaN', 'nan', '-nan']``.
'#NA', 'NULL', 'NaN', '-NaN', 'nan', '-nan']``. Although a 0-length string
``''`` is not included in the default ``NaN`` values list, it is still treated
as a missing value.

.. code-block:: python

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