pandas 1.4.2

NotesParameters
append(self, key: 'str', value: 'DataFrame | Series', format=None, axes=None, index=True, append=True, complib=None, complevel: 'int | None' = None, columns=None, min_itemsize: 'int | dict[str, int] | None' = None, nan_rep=None, chunksize=None, expectedrows=None, dropna: 'bool | None' = None, data_columns: 'Literal[True] | list[str] | None' = None, encoding=None, errors: 'str' = 'strict')

Notes

Does not check if data being appended overlaps with existing data in the table, so be careful

Parameters

key : str
value : {Series, DataFrame}
format : 'table' is the default

Format to use when storing object in HDFStore. Value can be one of:

'table'

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 : bool, default True

Append the input data to the existing.

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 :None:None:`here <https://pandas.pydata.org/pandas-docs/stable/user_guide/io.html#query-via-data-columns>`.

min_itemsize : dict of columns that specify minimum str sizes
nan_rep : str to use as str nan representation
chunksize : size to chunk the writing
expectedrows : expected TOTAL row size of this table
encoding : default None, provide an encoding for str
dropna : bool, default False

Do not write an ALL nan row to the store settable by the option 'io.hdf.dropna_table'.

Append to Table in file. Node must already exist and be Table format.

Examples

See :

Local connectivity graph

Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.

Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)

SVG is more flexible but power hungry; and does not scale well to 50 + nodes.

All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them


File: /pandas/io/pytables.py#1196
type: <class 'function'>
Commit: