os.errno doesn't exists anymore in Python 3.7

[artix41]

Informations

• Qiskit Terra version: 0.6.1
• Python version: 3.7.0 − Jupyter Notebook
• Operating system: Ubuntu 16.04.1

What is the current behavior?

I used circuit_drawer() on a Jupyter notebook without having latex installed on my computer, but instead of getting the message WARNING: Unable to compile latex. Is pdflatex installed?, I got the following error:

~/miniconda3/envs/qiskit/lib/python3.7/site-packages/qiskit/tools/visualization/_circuit_visualization.py in latex_circuit_drawer(circuit, basis, scale, filename, style)
    292                            check=True)
    293         except OSError as e:
--> 294             if e.errno == os.errno.ENOENT:
    295                 logger.warning('WARNING: Unable to compile latex. '
    296                                'Is `pdflatex` installed? '

AttributeError: module 'os' has no attribute 'errno'

Suggested solutions

Replacing os.errno by just errno (after having imported it). See for instance this thread on the Python bug tracker

[diego-plan9]

Thanks @artix41 for the report - and for taking the time of provide a spot-on and informative suggested solution!