31.10.18 01:44, Giampaolo Rodola' пише:
Sorry in advance if this has been proposed in the past but I couldn't
find anything on python-ideas:
>>> l = []
>>> l.pop(default=1)
1
FWIW my use case consists in reading entries from /proc/diskstats where
lines can have a variable number of fields depending on the kernel version:
https://github.com/giampaolo/psutil/issues/1354#issuecomment-434495870
https://github.com/giampaolo/psutil/blob/d8b05151e65f9348aff9b58da977abd8cacb2127/psutil/_pslinux.py#L1068
As such it would be convenient to set missing fields to 0 as "reads =
fields.pop(default=0)" instead of catching IndexError every time. Extra:
for consistency set.pop() should probably have the same.
Thoughts?
It is just
l.pop() if l else default
or
(l or [default]).pop()
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