ZeroDivisionError when server has no swap

[iuridiniz]

Hello

Description
When the machine has no swap, the pg_activity does not open

Software version: 3.0.0

Steps to reproduce:
Configure a machine with no swap, launch pg_activity

Expected results:
pg_activity opens

Actual results:
pg_acrivity crashes with ZeroDivisionError: division by zero

root@db1:~# pg_activity 

Traceback (most recent call last):
  File "/usr/local/bin/pg_activity", line 8, in <module>
    sys.exit(main())
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/cli.py", line 407, in main
    ui.main(term, dataobj, host, args)
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/ui.py", line 250, in main
    width=width,
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/views.py", line 572, in screen
    width=width,
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/views.py", line 124, in wrapper
    for line in func(term, *args, **kwargs):
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/views.py", line 324, in header
    [f"{render(free)} ({render(system_info.swap.pct_free)}) free"],
  File "/usr/local/pythonenv/pg_activity/lib/python3.7/site-packages/pgactivity/types.py", line 704, in pct_free
    return Pct(self.free * 100 / self.total)
ZeroDivisionError: division by zero
root@db1:~# free
              total        used        free      shared  buff/cache   available
Mem:       32296672     6219592      571240      622296    25505840    25097340
Swap:             0           0           0
root@evoluxio-db1:~# 

[blogh]

thanks for reporting this !