DataFrame.pct_change(periods=1, fill_method='pad', limit=None, freq=None, **kwargs)

DataFrame.cov(min_periods=None)

DataFrame.filter(items=None, like=None, regex=None, axis=None)

DataFrame.ffill(axis=None, inplace=False, limit=None, downcast=None)

DataFrame.groupby(by=None, axis=0, level=None, as_index=True, sort=True, group_keys=True, squeeze=False, **kwargs)

DataFrame.empty True if NDFrame is entirely empty [no items], meaning any of the axes are of length 0.

DataFrame.to_html(buf=None, columns=None, col_space=None, header=True, index=True, na_rep='NaN', formatters=None, float_format=None, sparsify=None

DataFrame.sem(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs)

DataFrame.plot.line(x=None, y=None, **kwds)

DataFrame.applymap(func)