def check_asymm_device(p):
	"""
	Check if device is asymmetric (one Al strip) or symmetric (two Al strips).

	Returns
	-------
	p.asymmetric : 	Boolean
					Is used later in naming files and plot titles, and initiates saving the size p.Nxasymmetric of the SC strip and middle retion altogether to the Simplenamespace object p containing the parameters of the system.
	"""

	if len(p.right) == 0:
		p.asymmetric = True	# to be used when printing last blocks of the Hamiltonian
		p.Nxasymmetric = len(p.left) + len(p.middle)
	else:
		p.asymmetric = False
	return p.asymmetric