Matplotlib circuit drawer

[sergiomtzlosa]

A new class named MPLDrawer to draw the circuit using matplotlib, this is a code integration and enhancement from https://github.com/rpmuller/PlotQCircuit.

The circuit now has a function called draw_mpl() to invoke matplotlib on drawing.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.

[alecandido]

There are things that may still be improved. But that will be the case forever ^^

As the first implementation of this feature in Qibo, it is definitely acceptable.

Thanks a lot @sergiomtzlosa! :)

[MatteoRobbiati]

Thanks a lot @sergiomtzlosa for this!
A few comments follow.

[MatteoRobbiati]

Thanks a lot for the modifications @sergiomtzlosa.
If it is fine with you I would prefer to align the docstrings style with the rest of Qibo :) The docstrings here are a bit different from the "canonical" way we do them. You can take this or this as examples (I just selected them randomly).

Finally, I was wondering if we aim to add the mpldrawer to the documentation. In that case we have to add it to the doc/source files. I think it would be nice to prepare a simple example to show the users how to use the drawer :)

Once this is done, I think we are ready to merge!

[sergiomtzlosa]

Hi,

Thanks a lot for your support and advices, I have uploaded the documentation and gave and example on the doc/source path, please, let me know if this is enough of not.

Thanks!

[MatteoRobbiati]

Thanks a lot @sergiomtzlosa!