https://numpy.org/devdocs/reference/ np.array([], dtype=...) np.zeros((3, 4)) np.ones((3, 4), dtype=...) zeros_like ones_like reshape arange linspace + * @ a.sum(), min, max a.sum(axis=0) a.shape [pozor, není to funkce] slices [pozor, nekopírují] a.copy() stretching matplotlib.pyplot.annotate(s, xy, *args, **kwargs) axis(\*args, \*\*kwargs) bar clf() figlegend fig = figure(figsize=...) grid hist ? savefig show subplot title xlabel ylabel xlim ylim x/yscale suptitle text tick_params xkcd random.seed randrange random uniform choice choices(list, k=10) shuffle(list) sample(list, k=10)