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DOC: add data_columns to doc string of to_hdf and HDFStore.append #14046

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Aug 19, 2016
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DOC: add data_columns to doc string of to_hdf and HDFStore.append #14046

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12 changes: 7 additions & 5 deletions pandas/core/generic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1105,18 +1105,20 @@ def to_hdf(self, path_or_buf, key, **kwargs):
and if the file does not exist it is created.
``'r+'``
It is similar to ``'a'``, but the file must already exist.
format : 'fixed(f)|table(t)', default is 'fixed'
format : 'fixed(f)|table(t)', default is 'fixed'
fixed(f) : Fixed format
Fast writing/reading. Not-appendable, nor searchable
table(t) : Table format
Write as a PyTables Table structure which may perform
worse but allow more flexible operations like searching
/ selecting subsets of the data
append : boolean, default False
append : boolean, default False
For Table formats, append the input data to the existing
data_columns : list of columns to create as data columns, or True to
use all columns. See
`here <http://pandas.pydata.org/pandas-docs/stable/io.html#query-via-data-columns>`__ # noqa
data_columns : list of columns, or True, default None
List of columns to create as indexed data columns for on-disk
queries, or True to use all columns. By default only the axes
of the object are indexed. See `here
<http://pandas.pydata.org/pandas-docs/stable/io.html#query-via-data-columns>`__.

Applicable only to format='table'.
complevel : int, 1-9, default 0
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8 changes: 5 additions & 3 deletions pandas/io/pytables.py
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Expand Up @@ -938,9 +938,11 @@ def append(self, key, value, format=None, append=True, columns=None,
/ selecting subsets of the data
append : boolean, default True, append the input data to the
existing
data_columns : list of columns to create as data columns, or True to
use all columns. See
`here <http://pandas.pydata.org/pandas-docs/stable/io.html#query-via-data-columns>`__ # noqa
data_columns : list of columns, or True, default None
List of columns to create as indexed data columns for on-disk
queries, or True to use all columns. By default only the axes
of the object are indexed. See `here
<http://pandas.pydata.org/pandas-docs/stable/io.html#query-via-data-columns>`__.
min_itemsize : dict of columns that specify minimum string sizes
nan_rep : string to use as string nan represenation
chunksize : size to chunk the writing
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