George Sakkis <george.sak...@gmail.com> added the comment:
Just bitten by this (through a 3rd party library that uses this pattern) and
I'm wondering why it was closed as invalid. Passing a non-empty fromlist string
also imports the tail module but without the side effect of double import, so
it's not generally harmful. More surprisingly, a colleague discovered
accidentally that the same behavior happens if you pass one or more slashes:
__import__('pkg', fromlist=['', '/', '//']) imports 'pkg', 'pkg.', 'pkg./' and
'pkg.//' !
I'm not arguing that using fromlist to import the tail module is not a hack,
but the behavior for empty strings and slashes (and whatever else causes
multiple imports) is clearly a bug. Unless someone is actually relying on this
double import behavior (very unlikely), I think it should be fixed.
----------
nosy: +gsakkis
versions: +Python 2.7
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<http://bugs.python.org/issue2090>
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