New submission from Stephen Larroque:
This is a followup of issue 23174.
When using `shelve.open(tempfile.mkstemp()[1])`, the shelve (or anydbm or
dumbdbm) fail with "anydbm.error: db type could not be determined".
Instead, the module could detect the file is empty and use it as if it were not
existing before ('c' or 'n' flag). For the moment, there is no way around
except creating the temporary file and then delete it.
----------
components: IO
messages: 299790
nosy: Stephen Larroque
priority: normal
severity: normal
status: open
title: shelve.open of temporary file fails with error "anydbm.error: db type
could not be determined"
type: behavior
versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7
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<http://bugs.python.org/issue31125>
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