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MPL drawer support for complex custom instructions

See original GitHub issue

The following circuit is being draw like wrongly:

from qiskit.circuit import Gate, Parameter
qinst = QuantumRegister(1, 'q')
cinst = ClassicalRegister(1, 'c')

inst = QuantumCircuit(qinst, cinst, name='instruction').to_instruction()

qr = QuantumRegister(2, 'q')
cr = ClassicalRegister(2, 'c')
circuit = QuantumCircuit(qr, cr)
circuit.append(inst, [qr[0]], [cr[1]])
circuit.draw(output='mpl')

It should be similar to this: Considering the following custom instruction:

        ┌─────────────┐            
q_0: |0>┤1            ├            
        │             │            
q_1: |0>┤             ├            
        │ instruction │            
 c_0: 0 ╡             ╞            
        │             │            
 c_1: 0 ╡0            ╞            
        └─────────────┘

Additionally, based on the consensus in #3073, the mpl drawer should support controlled/conditional custom instructions. The following is an example for conditional:

from qiskit.circuit import Gate, Parameter
qinst = QuantumRegister(1, 'q')
cinst = ClassicalRegister(1, 'c')

inst = QuantumCircuit(qinst, cinst, name='instruction').to_instruction()

qr = QuantumRegister(2, 'q')
cr = ClassicalRegister(2, 'c')
circuit = QuantumCircuit(qr, cr)
circuit.append(inst, [qr[0]], [cr[1]]).c_if(cr, 2)
circuit.draw(output='mpl')

Controlled is not yet supported (see #2862).

Issue Analytics

State:
Created 4 years ago
Comments:7 (3 by maintainers)

Top GitHub Comments

2reactions

yesodharan1892commented, Jan 9, 2020

hi, i think i have the solution for that , can you assign it to me so that i can look into it.

0reactions

yesodharan1892commented, May 17, 2021

Hi apologies as I’ve been offline due to some personal reasons. Seems the issue is addressed as per #6339

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