importnumpyasnp# 👇️ declared one-dimensional array (second nested list has only 1 item)arr = np.array([[1,2], [3], [5,6]])print(arr.shape)# 👉️ (3,)# ⛔️ IndexError: too many indices for array: array is 1-dimensional, but 2 were indexedprint(arr[:,0]) 请注...