To suppress PyCharm code inspections for a particular line of code you can use the following construct:
# noinspection INSPECTION_NAME
your_line_of_code_to_suppress
where the name of the inspection (INSPECTION_NAME above) you can take from the list of inspection names (they are pretty descriptive).
To suppress pylint command line messages explicitly you have to use different comments/commands, as described here (pylint error names).