STINNER Victor added the comment:
I opened the issue when I read this change:
https://review.openstack.org/#/c/288224/2/neutron/common/utils.py
rndstr = hex(...)[2:]
# Whether there is a trailing 'L' is a py2/3 incompatibility
rndstr = rndstr.rstrip('L')
return rndstr.zfill(length)
can be simply written
return "{0:0{1}x}".format(..., length)
It's less readable, but it's more efficient.
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<http://bugs.python.org/issue26506>
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