Change tempdirs in test #657
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What is the problem / what does the code in this PR do
Can you briefly describe how it works?
Change the tempdir creation of some of our tests. The new procedure uses a tempdir created by
tempfile.TemporaryDirectorythis method has a weak reference in its init which ensures that the directory gets deleted if its reference is garbage collected. In this way we can ensure permission denied erros etc. on shared systems like dali.See also:
https://docs.python.org/3/library/tempfile.html#tempfile.TemporaryDirectory
and
https://stackoverflow.com/questions/50649701/shutil-rmtree-does-not-work-on-tempfile-temporarydirectory