On Sun, Feb 19, 2012 at 12:55:49AM +0100, Eike Welk wrote:
> I'm getting unexpected errors in a Python program that uses Launchpadlib.
>
> When the program wants to change attributes of a bug, it must first read one
> attribute of the bug; otherwise the program fails with an exception from deep
> inside Launchpadlib.
>
> I suspect that I use Launchpadlib in an unintended way. What is the right way
> to change attributes in Launchpad? Is there an official way to prepare
> objects, so that their attributes can be changed?
>
> Here is an example that illustrates the odd behavior:
>
>
> from launchpadlib.launchpad import Launchpad
> launchpad = Launchpad.login_with("bug-repo-syncer", "production")
If you only care about the bug, then instead of this:
> lp_task = launchpad.load(
> 'https://api.launchpad.net/1.0/bug-repo-syncer/+bug/934181')
> lp_bug = lp_task.bug
try:
lp_bug = launchpad.bugs[934181]
lp_task = lp_bug.bug_tasks[0]
Alternatively (this is a common idiom):
brs = launchpad.projects['bug-repo-syncer']
for lp_task in brs.searchTasks(assignee=launchpad.me):
lp_bug = lp_task.bug
#...
> #Un-commenting this makes the error go away.
> #lp_bug = launchpad.load("https://api.launchpad.net/1.0/bugs/934181";)
>
> #Un-commenting this makes the error go away too.
> #lp_bug.title
>
> lp_bug.title = "Test bug"
> lp_bug.description = "A bug for testing Launchpadlib."
>
>
> #Fails with:
> #Traceback (most recent call last):
> # File "lp_problem.py", line 8, in <module>
> # lp_bug.title = "Test bug"
> # File "/usr/local/lib/python2.7/
> #site-packages/lazr/restfulclient/resource.py", line 692, in __setattr__
> # if not self.lp_has_parameter(name):
> # File "/usr/local/lib/python2.7/
> #site-packages/lazr/restfulclient/resource.py", line 206, in lp_has_parameter
> # return self._get_external_param_name(param_name) is not None
> # File "/usr/local/lib/python2.7/
> #site-packages/lazr/restfulclient/resource.py", line 349, in
> # _get_external_param_name
> # if self._wadl_resource.get_parameter(name):
> # File "/usr/local/lib/python2.7/site-packages/wadllib/application.py",
> #line 452, in get_parameter
> # definition = self._find_representation_definition(media_type)
> # File "/usr/local/lib/python2.7/site-packages/wadllib/application.py",
> #line 564, in _find_representation_definition
> # "Resource is not bound to any representation, and no media "
> #wadllib.application.NoBoundRepresentationError: Resource is not bound to any
> # representation, and no media media type was specified.
>
>
> Eike.
>
>
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