[SciPy-Dev] when to drop numpy 1.5.x/1.6.x support?

[Ralf Gommers]

Hi all,

During the last week there were 3 PRs that failed because they used
features not available in numpy 1.5.x or 1.6.x:
  https://github.com/scipy/scipy/pull/4238 (copy kw to astype method)
  https://github.com/scipy/scipy/pull/4256 (out kw to ufuncs)
  https://github.com/scipy/scipy/pull/4260 (use of np.random.choice)

All those issues were/are fixable, but it looks like the balance of gain
from keeping support for those numpy versions to development effort of
supporting them is slowly shifting the wrong way. So questions:

1. Is anyone still relying on numpy 1.5.x or 1.6.x support for the next
scipy releases?
2. Is it time to drop support for those versions, or if not then when?

Cheers,
Ralf
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