請問我這個哪里出錯了

爺爺泡的茶

import numpy as np
a = ([[ "NEG",  "POS",  "NEG"],
     [ 9, 10, 11]])
print(np.where(a=="NEG")

alexru

In [1]: import numpy as np

In [2]: a = ([[ "NEG",  "POS",  "NEG"],
   ...:      [ 9, 10, 11]])

In [3]: np.where(a=="NEG")
Out[3]: (array([], dtype=int64),)