Adding a row to a character array

[Larz60+]

I thought this might work:

>>> np.concatenate([[b'*', b'*', b'*', b'*', b'O', b'*', b'O', b'*', b'*', b'*'], m, [b'*', b'*', b'*', b'*', b'O', b'*', b'O', b'*', b'*', b'*']])

but it raises the error

Error:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: all the input arrays must have same number of dimensions

It probably is something very similar