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DOC: Clarify how to keep lines with too many fields #44652

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14 changes: 14 additions & 0 deletions doc/source/user_guide/io.rst
Original file line number Diff line number Diff line change
Expand Up @@ -1306,6 +1306,20 @@ data that appear in some lines but not others:
1 4 5 6
2 8 9 10

In case you want to keep all data including the lines with too many fields, you can
specify a sufficient number of ``names``. This ensures that lines with not enough
fields are filled with ``NaN``.

.. code-block:: ipython

In [31]: pd.read_csv(StringIO(data), names=['a', 'b', 'c', 'd'])

Out[31]:
a b c d
0 1 2 3 NaN
1 4 5 6 7
2 8 9 10 NaN

.. _io.dialect:

Dialect
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