We cannot accquire the length of "characters_list"

[66qiu]

characters_list = np.asarray(self._characters.items())
......
return len(self.characters_list)

TypeError: len() of unsized object

[66qiu]

Python3.
np.asarray(list(self._characters.items()))

[Tankaishen]

Python3. np.asarray(list(self._characters.items()))
Still a problem：

np.asarray(list(self._characters.items()))

ValueError: setting an array element with a sequence. The requested array has an inhomogeneous shape after 2 dimensions. The detected shape was (1623, 2) + inhomogeneous part.

[A-cloud-bit]

为啥