def set_settings(settings):
for section, section_settings in settings.items():
for key, value in section_settings.items():
Settings.set_setting(section=section, key=key, value=value)
def t1(value):
"""The effective T1 to be used for noisy qubits"""
Settings.set_setting("BACKEND", "t1", str(value))
def construct_topology_config(topology, nodes, save_fig=True):
"""
Constructs a json file at config/topology.json, used to define the topology of the network.
:param topology: str
Should be one of the following: None, 'complete', 'ring', 'random_tree'.
:param nodes: list of str
List of the names of the nodes.
:param save_fig: bool
Whether to save a picture of the network
:return: None
"""
if topology:
if isinstance(topology, dict):
adjacency_dct = {node: topology[node] for node in nodes}
elif topology == "complete":
adjacency_dct = {}
for i, node in enumerate(nodes):
adjacency_dct[node] = nodes[:i] + nodes[i + 1:]
elif topology == "ring":
adjacency_dct = {}
nn = len(nodes)
for i, node in enumerate(nodes):
adjacency_dct[node] = [
nodes[(i - 1) % nn], nodes[(i + 1) % nn]
]
elif topology == "path":
adjacency_dct = {}
nn = len(nodes)
for i, node in enumerate(nodes):
if i == 0:
adjacency_dct[node] = [nodes[i + 1]]
elif i == (nn - 1):
adjacency_dct[node] = [nodes[i - 1]]
else:
adjacency_dct[node] = [
nodes[(i - 1) % nn], nodes[(i + 1) % nn]
]
elif topology == "random_tree":
adjacency_dct = get_random_tree(nodes)
elif topology[:16] == "random_connected":
try:
nr_edges = int(topology[17:])
except ValueError:
raise ValueError(
"When specifying a random connected graph use the format 'random_connected_{nr_edges}',"
"where 'nr_edges' is the number of edges of the graph.")
except IndexError:
raise ValueError(
"When specifying a random connected graph use the format 'random_connected_{nr_edges}',"
"where 'nr_edges' is the number of edges of the graph.")
adjacency_dct = get_random_connected(nodes, nr_edges)
else:
raise ValueError("Unknown topology name")
# Get path to SimulaQron folder
simulaqron_path = get_simulaqron_path.main()
if save_fig:
network = nx.from_dict_of_lists(adjacency_dct)
try:
nx.draw(network, with_labels=True)
except _tkinter.TclError as err:
logging.warning(
"Could not draw since there seems to be no screen. Error: {}"
.format(err))
else:
fig_path = os.path.join(simulaqron_path, "config/topology.png")
plt.savefig(fig_path)
topology_file = os.path.join(simulaqron_path, "config/topology.json")
with open(topology_file, "w") as top_file:
json.dump(adjacency_dct, top_file)
Settings.set_setting("BACKEND", "topology_file",
"config/topology.json")
else:
Settings.set_setting("BACKEND", "topology_file", "")
def nodes_file(value):
"""The path to the topology file to be used, can be ""."""
Settings.set_setting("BACKEND", "nodes_file", value)
def noisy_qubits(value):
"""Whether qubits should be noisy (on/off)"""
if value == "on":
Settings.set_setting("BACKEND", "noisy_qubits", 'True')
else:
Settings.set_setting("BACKEND", "noisy_qubits", 'False')
def recv_retry_time(value):
"""When receiving a qubit or EPR pair, how long to wait between checks of whether a qubit is received."""
Settings.set_setting("BACKEND", "waittimerecv", str(value))
def log_level(value):
"""Log level for both backend and frontend."""
Settings.set_setting("BACKEND", "loglevel", value)
Settings.set_setting("FRONTEND", "loglevel", value)
def recv_timeout(value):
"""When receiving a qubit or EPR pair, how long to wait until raising a timeout."""
Settings.set_setting("BACKEND", "recvtimeout", str(value))
Settings.set_setting("BACKEND", "recveprtimeout", str(value))
def conn_retry_time(value):
"""If setup fails, how long to wait until a retry."""
Settings.set_setting("BACKEND", "waittime", str(value))
def max_registers(value):
"""How many registers a node can hold."""
Settings.set_setting("BACKEND", "maxregs_per_node", str(value))
def max_qubits(value):
"""Max virt-qubits per node and max sim-qubits per register."""
Settings.set_setting("BACKEND", "maxqubits_per_node", str(value))
def backend(value):
"""The backend to use (stabilizer, projectq, qutip)."""
Settings.set_setting("BACKEND", "backend", value)