DataFrame.rank(axis=0, method='average', numeric_only=None, na_option='keep', ascending=True, pct=False)
DataFrame.skew(axis=None, skipna=None, level=None, numeric_only=None, **kwargs)
DataFrame.to_period(freq=None, axis=0, copy=True)
DataFrame.drop_duplicates(*args, **kwargs)
DataFrame.eval(expr, inplace=None, **kwargs)
DataFrame.at Fast label-based scalar accessor Similarly to loc, at provides label
DataFrame.ndim Number of axes / array dimensions
DataFrame.swapaxes(axis1, axis2, copy=True)
DataFrame.corr(method='pearson', min_periods=1)
DataFrame.plot.hist(by=None, bins=10, **kwds)
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