Adding meta-information/metadata to pandas DataFrame

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Sure, like most Python objects, you can attach new attributes to a pandas.DataFrame:

import pandas as pd
df = pd.DataFrame([])
df.instrument_name="Binky"

Note, however, that while you can attach attributes to a DataFrame, operations performed on the DataFrame (such as groupby, pivot, join or loc to name just a few) may return a new DataFrame without the metadata attached. Pandas does not yet have a robust method of propagating metadata attached to DataFrames.

Preserving the metadata in a file is possible. You can find an example of how to store metadata in an HDF5 file here.

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