A setter method always takes a parameter and does not return a value.

Rename 'set_stats_snmp' method to 'get_stats_snmp'.

Empty sets evaluate to False.

Correct check issue error in client/server mode (issue #459) + exit on check failed + correct another issue on Linux CPU SNMP

Clean up import order.

One-line docstring should not occupy 3 lines
Expected 1 blank line *before* class docstring
First line should end with '.'
Blank line missing between one-line summary and description
No blank lines allowed *after* method docstring
Use r""" if any backslashes in a docstring

Use CapWords convention for class names
Use new-style classes
Use lowercase with underscore for function and local variable names
(to be continued)

Use format() instead of % method.

- remove obsolete code
- glances_password: update comments and fix typos
- re-apply fix to avoid string format conflicts (screwed up after
  feature branch merges)
- strip trailing whitespaces
- flake8