查看数组有多少类别
import numpy as np
array = [1,2,3,2,1,2,1]
np.unique(array)
-------------------------
array([1, 2, 3])
# x
np.sum(x)
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查看数组有多少类别
import numpy as np
array = [1,2,3,2,1,2,1]
np.unique(array)
-------------------------
array([1, 2, 3])
# x
np.sum(x)