Bug 965590 - [rfe] Provide method to detect empty Container
[rfe] Provide method to detect empty Container
Product: Fedora
Classification: Fedora
Component: python-nitrate (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Petr Šplíchal
Fedora Extras Quality Assurance
: FutureFeature
Depends On:
  Show dependency treegraph
Reported: 2013-05-21 07:50 EDT by Lukas Zachar
Modified: 2016-05-31 21:44 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Enhancement
Doc Text:
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Clone Of:
Last Closed: 2015-02-18 06:11:41 EST
Type: Bug
Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description Lukas Zachar 2013-05-21 07:50:12 EDT
Description of problem:

Please provide a way to query whether nitrate.Container is empty. 

My typical use case is to call method on every item but it is difficult to warn user that nothing can be processed.

I'd like to be able to do something similar to:
if nitrate.Collection.is_empty(): log.warning("Nothing to process here")
for item in nitrate.Collection: process(item)

In the current state I need to use private property _items, which feels like a workaround and IMHO should be avoided:
if not nitrate.Collection._items: log.warning("Nothing to process here")
Comment 1 Petr Šplíchal 2013-10-29 13:17:11 EDT
This should be fixed as Container class now provides number of
items included (which is used when converting into bool):


>>> case = TestCase(101398)
>>> print case.tags
>>> bool(case.tags)
>>> case.tags.remove(Tag('test'))
>>> bool(case.tags)
Comment 2 Fedora End Of Life 2015-01-09 17:33:51 EST
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Comment 3 Fedora End Of Life 2015-02-18 06:11:41 EST
Fedora 19 changed to end-of-life (EOL) status on 2015-01-06. Fedora 19 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

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