6丁儿的猫

numpy.expand_dims(a, axis)[source] Expand the shape of an array. Insert a new axis that will appear at the axis position in the expanded array shape. Note Previous to NumPy 1.13.0, neither

>>matrix = np.array([ [5, 10, 15], [20, 25, 30], [35, 40, 45] ]) >> matrix[:,1] array([10, 25, 40])>> ma...

highest_value = 0 highest_key = None for country in totals: consumption = totals[country] if highest_value < consumption: highest_value = consumption highest_key = countryto...