dq.isbra

isbra(x: QArrayLike) -> bool

Returns True if the qarray is in the format of a bra.

Parameters:

• x (qarray-like of shape (...)) –

  Qarray-like.

Returns:

• True if the second to last dimension of x is 1, False otherwise.

Examples:

>>> dq.isbra(jnp.ones((1, 3)))
True
>>> dq.isbra(jnp.ones((5, 1, 3)))
True
>>> dq.isbra(jnp.ones((3, 3)))
False