Bug#896310: python-tf-conversions: tf_conversions fails to import

[Jochen Sprickerhof]

Control: severity -1 normal

Hi Helmut,

thanks for the bug report. I fixed some of the dependencies, but 
ultimately this depends on pykdl which is currently not in Debian, but 
upstream recently released a new version with it, so I expect it to 
become part of the orocos-kdl package. Until then I downgrade this to 
normal, as this module is rather unimportant but part of a bigger source 
package.

Chees Jochen

* Helmut Grohne <helmut at subdivi.de> [2018-04-20 22:01]:
>Package: python-tf-conversions
>Version: 1.11.9-1+b1
>Severity: serious
>User: helmutg at debian.org
>Usertags: python-import
>
>After installing python-tf-conversions importing the module tf_conversions
>into a python interpreter fails with the following error:
>
>Traceback (most recent call last):
>  File "<string>", line 1, in <module>
>  File "/usr/lib/python2.7/dist-packages/tf_conversions/__init__.py", line 28, in <module>
>    from posemath import *
>  File "/usr/lib/python2.7/dist-packages/tf_conversions/posemath.py", line 29, in <module>
>    from tf import transformations
>  File "/usr/lib/python2.7/dist-packages/tf/__init__.py", line 28, in <module>
>    from tf2_ros import TransformException as Exception, ConnectivityException, LookupException, ExtrapolationException
>ImportError: No module named tf2_ros
>
>The vast majority of import failures is attributed to missing dependencies.
>Often times that manifests as an ImportError or ModuleNotFoundError.
>Typically, dependencies should be inserted by dh-python via ${python:Depends}
>or ${python3:Depends}. Thus a missing dependency can be caused by incomplete
>install_requires in setup.py. Sometimes a missing dependency of a dependency
>is the cause, in such cases this bug should be reassigned.
>
>Helmut
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