`tensorfllow`: `Tensor.__bool__`'s signature is incorrect for one element tensors

[hoel-bagard]

CurrentlyTensor.__bool__'s signature is as follows:

class Tensor:
    def __bool__(self) -> NoReturn: ...

It suggests that the method should never be called, however the following is valid code:

import tensorflow as tf

bool(tf.constant([1]))

Since this depends on the shape of the tensor, I don't know if this can be fixed, but it would be nice to have.