DataFrame.sum(axis=None, skipna=None, level=None, numeric_only=None, **kwargs)

DataFrame.div(other, axis='columns', level=None, fill_value=None)

DataFrame.reindex_like(other, method=None, copy=True, limit=None, tolerance=None)

classmethod DataFrame.from_csv(path, header=0, sep=', ', index_col=0, parse_dates=True, encoding=None, tupleize_cols=False, infer_

DataFrame.select(crit, axis=0)

DataFrame.irow(i, copy=False)

DataFrame.loc Purely label-location based indexer for selection by label. .loc[] is primarily label

DataFrame.truncate(before=None, after=None, axis=None, copy=True)

DataFrame.mask(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True)

DataFrame.idxmax(axis=0, skipna=True)