एक साथ कई rolling फीचर इंजीनियर करना

# Define a rolling window with Pandas, excluding the right-most datapoint of the window
prices_perc_rolling = prices_perc.rolling(20, min_periods=5, closed='right')

# Define the features you'll calculate for each window
features_to_calculate = [np.min, ____, ____, ____]

# Calculate these features for your rolling window object
features = prices_perc_rolling.____(features_to_calculate)

# Plot the results
ax = features.loc[:"2011-01"].plot()
prices_perc.loc[:"2011-01"].plot(ax=ax, color='k', alpha=.2, lw=3)
ax.legend(loc=(1.01, .6))
plt.show()