The code has been changed in stable/newton, stable/ocata and master.
So the issue does not exist currently (in stable/newton, stable/ocata and
master).
** Changed in: nova
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1414556
Title:
"if not host:" never holds in function
get_instance_availability_zone() of module nova.availability_zones
Status in OpenStack Compute (nova):
Invalid
Bug description:
Version: stable/juno
Description:
This bug report is created to separate two issues found in this link:
https://bugs.launchpad.net/nova/+bug/1390033.
The purpose is to fix at first the bug that the "if not host:" never holds in
function get_instance_availability_zone() of module nova.availability_zones in
case host is None. This is because str(None) is never interpreted False.
For proof, please look at the output of the Python interactive
session:
Python 2.7.6 (default, Mar 22 2014, 22:59:56)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> host = str(None)
>>> print host
None
>>> if not host:
.......print "if not host"
....else:
...... print "else"
...
else
>>> var = None
>>> if not var:
.......print "if not var"
....else:
.......print "else"
...
if not var
So, it can be seen that str(None) returns an object whose value is
None, but it is not interpreted False as expected!
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