pandas.errors.AttributeConflictWarning#

exception pandas.errors.AttributeConflictWarning[source]#

Warning raised when index attributes conflict when using HDFStore.

Occurs when attempting to append an index with a different name than the existing index on an HDFStore or attempting to append an index with a different frequency than the existing index on an HDFStore.

See also

HDFStore: Dict-like IO interface for storing pandas objects in PyTables.
DataFrame.to_hdf: Write the contained data to an HDF5 file using HDFStore.
read_hdf: Read from an HDF5 file into a DataFrame.

Examples

>>> idx1 = pd.Index(["a", "b"], name="name1")
>>> df1 = pd.DataFrame([[1, 2], [3, 4]], index=idx1)
>>> df1.to_hdf("file", "data", "w", append=True)  
>>> idx2 = pd.Index(["c", "d"], name="name2")
>>> df2 = pd.DataFrame([[5, 6], [7, 8]], index=idx2)
>>> df2.to_hdf("file", "data", "a", append=True)  
AttributeConflictWarning: the [index_name] attribute of the existing index is
[name1] which conflicts with the new [name2]...