[OS] process_iter() cached item ignored the killed process

[rsik88]

Summary

• OS: { Centos 8 }
• Architecture: { 64bit, 3 }
• Psutil version: { 5.8.0 }
• Python version: { 3.6.8 }
• Type: { core }

Description

{{{
psutil.process_iter() call caches pid etc. When a process restarted, it didn't update and still keeps the old pid. It would be nice to have a function to allow refresh the process list when needed.
}}}

[giampaolo]

process_iter() is already supposed to handle PIDs being reused, see:

psutil/psutil/__init__.py

Lines 1444 to 1453 in 5d39cc9

	# use is_running() to check whether PID has been
	# reused by another process in which case yield a
	# new Process instance
	if proc.is_running():
	if attrs is not None:
	proc.info = proc.as_dict(
	attrs=attrs, ad_value=ad_value)
	yield proc
	else:
	yield add(pid)