Thread.isAlive() has been removed in Python 3.9 in favor for is_alive().

[ProgenitorX]

multimaster_fkie/fkie_master_discovery/src/fkie_master_discovery/master_monitor.py

Line 596 in 52f3250

if th.isAlive():

This threw a deprecated warning in Python 3.8, but now has been removed entirely in Python 3.9. I manually changed it to is_alive() and no issues so far. Should work with any Python 3.5+ versions since it's been there since, with the same functionality as isAlive().

[atiderko]

Thank you for reporting!

[amilcarlucas]

Does this mean that it now requires Python >= 3.5 ?

[atiderko]

Does this mean that it now requires Python >= 3.5 ?

You can still use multimaster with Python 2.7