np.repeat()https://numpy.org/doc/stable/reference/generated/numpy.repeat.html#numpy-repeat
对单个元素进行重复
所有元素重复相同次数
>>> kk=np.repeat([1,2,3], 2).tolist() >>> kk [1, 1, 2, 2, 3, 3]
不同元素重复不同次数
>>> kk=np.repeat(["aa","bb","cc"], [1,2,3]).tolist() >>> kk ['aa', 'bb', 'bb', 'cc', 'cc', 'cc']
np.tile()https://numpy.org/doc/stable/reference/generated/numpy.tile.html#numpy.tile
>>> kk=np.tile(["aa","bb","cc"], 2).tolist() >>> kk ['aa', 'bb', 'cc', 'aa', 'bb', 'cc']
