Import collisions (was Re: "from module import data; print(data)")

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From	Chris Angelico <rosuav@gmail.com>
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Subject	Import collisions (was Re: "from module import data; print(data)")
Date	Thu, 25 Feb 2016 12:19:20 +1100
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On Thu, Feb 25, 2016 at 12:07 PM, Dan Stromberg <drsalists@gmail.com> wrote:
> PS: Haskell seems better at the former than Python; Haskell tells you
> if you import two identical symbols from two different places, when
> you try to use one of them - not at import time.  I believe in Python,
> whichever symbol you import last, wins.  Haskell does not warn you at
> import time, which is fine.  Not sure about OCaml or whatever else.

In a sense, it's not the two imports that matter, but the situation
that the second import statement is rebinding a name. Would it be
possible to create a "mollyguard" import hook that snoops the globals
of the importing module and raises an ImportWarning if it detects a
rebind?

Not that I've ever been in the situation of wanting one, but just as a
point of intellectual curiosity.

ChrisA

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Import collisions (was Re: "from module import data; print(data)") Chris Angelico <rosuav@gmail.com> - 2016-02-25 12:19 +1100

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