def __str__(self) -> str:
# If all qubits are grid qubits, render an appropriate text diagram.
if all(isinstance(q, devices.GridQubit) for q in self.qubits):
diagram = circuits.TextDiagramDrawer()
qubits = cast(List['cirq.GridQubit'], self.qubits)
# Don't print out extras newlines if the row/col doesn't start at 0
min_col = min(q.col for q in qubits)
min_row = min(q.row for q in qubits)
for q in qubits:
diagram.write(q.col - min_col, q.row - min_row, str(q))
# Find pairs that are connected by two-qubit gates.
Pair = Tuple['cirq.GridQubit', 'cirq.GridQubit']
pairs = {
cast(Pair, pair)
for gate_defs in self.gate_definitions.values()
for gate_def in gate_defs if gate_def.number_of_qubits == 2
for pair in gate_def.target_set if len(pair) == 2
}
# Draw lines between connected pairs. Limit to horizontal/vertical
# lines since that is all the diagram drawer can handle.
for q1, q2 in sorted(pairs):
if q1.row == q2.row or q1.col == q2.col:
diagram.grid_line(q1.col - min_col, q1.row - min_row,
q2.col - min_col, q2.row - min_row)
return diagram.render(horizontal_spacing=3,
vertical_spacing=2,
use_unicode_characters=True)
return super().__str__()
def _render(diagram: circuits.TextDiagramDrawer) -> str:
w = diagram.width()
h = diagram.height()
qwx = {(x, y + 1)
for x, y1, y2, _ in diagram.vertical_lines for y in range(y1, y2)}
qw = {(x, y)
for y, x1, x2, _ in diagram.horizontal_lines for x in range(x1, x2)}
diagram2 = circuits.TextDiagramDrawer()
for y in range(h):
for x in range(max(0, w - 1)):
key = (x, y)
diagram_text = diagram.entries.get(key)
v = '&' + (diagram_text.text if diagram_text else '') + ' '
diagram2.write(2 * x + 1, y, v)
post1 = '\\qw' if key in qw else ''
post2 = '\\qwx' if key in qwx else ''
diagram2.write(2 * x + 2, y, post1 + post2)
diagram2.write(2 * w - 1, y, '&\\qw\\\\')
grid = diagram2.render(horizontal_spacing=0, vertical_spacing=0)
output = '\Qcircuit @R=1em @C=0.75em {\n \\\\\n' + grid + '\n \\\\\n}'
return output
def __str__(self) -> str:
diagram = circuits.TextDiagramDrawer()
for q in self.qubits:
diagram.write(q.x, 0, str(q))
for q2 in self.neighbors_of(q):
diagram.grid_line(q.x, 0, q2.x, 0)
return diagram.render(horizontal_spacing=3, vertical_spacing=2, use_unicode_characters=True)
