The parameter idle_wires default flipped to False in all circuit drawers
#13865
Conversation
|
One or more of the following people are relevant to this code:
|
Pull Request Test Coverage Report for Build 13541602976Details
💛 - Coveralls |
There was a problem hiding this comment.
I was going to say that this is a better default, but then I thought: actually I use the drawers quite a lot for small-scale drawing, and I think suppressing idle wires there by default is quite possibly surprising behaviour.
I wonder if it's worth having idle_wires take a number to use as a cut-off size: if there are n or more idle wires (possibly only count qubit ones), hide them, and if there's fewer, show them? So idle_wires=0 is the same as the current idle_wires=False. We'd have to catch idle_wires=True and turn it into idle_wires=math.inf, potentially.
Alternatively, we ignore the int stuff, and add a third option to idle_wires: "layout". I think this might be the happiest middle-ground: if the circuit has been transpiled to a layout (so the left margin will indicate qubit mapping), then we set idle_wires=False, and if it hasn't, we set idle_wires=True. (Could also call the option "auto" or something.)
I'm not 100% convinced of that, I'm just slightly concerned about breaking usability of drawing small-scale circuits - I would think there's a pretty sizeable number of people who almost invariably draw those, and it'd be confusing if wires are sometimes hidden on them.
| upgrade_visualization: | ||
| - | | ||
| The default for the parameter ``idle_wires`` changed to ``False`` in all the circuit drawers. If you still want to see wires without instructions, set ``idle_wires=True`` explicitly. |
There was a problem hiding this comment.
It might help to either explain a bit more, or put in a couple of text-mode drawings just to illustrate the difference? I'm not sure users necessarily know what the option is.
Summary
Closes #12361
Details and comments
As QPUs are getting bigger, also the circuits are growing in terms of qubits.