[Distutils] requiring python 2.5
bhendrix at enthought.com
Fri Jun 15 01:28:22 CEST 2007
We require setuptools >=0.7.0 for windows anyway, if that makes any
Rick Ratzel wrote:
> Arg...I thought I had this working, but it turns out I had a setuptools 0.7
> dev release installed. When I go to a setuptools 0.6 release, I get the same
> old problem. Here are more details...
> Enstaller is started with a script generated when easy_install installs the
> egg, so right away pkg_resources is imported and I have no chance to do anything
> before. I put the following in enstaller's __init__.py as recommended:
> from os import path
> import enthought
> enthought.__path__ = [path.dirname( path.dirname( __file__ ) )]
> and confirmed that it is indeed setting the __path__ for enthought correctly
> with a "print enthought.__path__" in another enstaller module imported later,
> which produced:
> This is compared to the two screenfuls of 'enthought.' paths without that
> code. As mentioned, this works great for setuptools 0.7, but as soon as I
> switch out 0.7 for 0.6, I get ImportErrors from package mismatches as python
> finds other incompatible 'enthought.' packages on the system instead of the ones
> bundled in the enstaller egg. If I leave the above code out completely, neither
> 0.6 or 0.7 work (as expected).
> Can you point out what, if anything, I'm doing wrong, since I thought setting
> enthought.__path__ is supposed to work with 0.6?
> I think I have three options at this point:
> 1.) have enstaller require setuptools>=0.7 (which enthought is hosting and will
> be found automatically by the enstaller install script)
> 2.) write a function in the enstaller egg build script that bundles all the
> packages into a namespace other than 'enthought.' inside of the egg, say
> 'bundle.' for example, and does a global search-and-replace of 'enthought.'
> with 'bundle.' Assuming the script gets everything, this seems like it would
> be the most straightforward and would not require me to fiddle with the
> python/setuptools import machinery.
> 3.) find the silly mistake I made which is causing the initial fix to break for
> 0.6, if possible.
> Thanks in advance!
>> Date: Sat, 09 Jun 2007 16:04:45 -0400
>> From: "Phillip J. Eby" <pje at telecommunity.com>
>> At 09:26 PM 6/8/2007 -0500, Rick Ratzel wrote:
>> > Is there a way to have my package tell setuptools to "ignore"
>> > certain other
>> Only through version specifications; i.e., request the exact versions you want.
>> > I've tried removing all the "enthought." eggs from sys.path
>> > before anything
>> >else gets imported, but even that doesn't work (and it just felt wrong, and
>> >probably is).
>> If "enthought" is a namespace package, you would need to either be
>> using an 0.7-development version of setuptools (i.e., a trunk SVN
>> version), or else you'd need to remove those eggs from the path
>> *before* pkg_resources is first imported. Otherwise, it would indeed not work.
>> >I looked at the docs for manipulating the WorkingSet, but made no
>> >progress there either...python always managed to find the incompatible
>> >enthought.traits code in the enthought.traits egg. When I remove the
>> >incompatible enthought.traits, all works fine.
>> > What I'd like to do is simply say "do not use any enthought.*
>> > eggs". Is this
>> >possible? Thanks in advance!
>> Not without using an 0.7 version of setuptools, or manipulating
>> enthought.__path__. The straightforward way to do it would be for
>> enstaller's __init__.py to do this:
>> import enthought, os
>> enthought.__path__ = os.path.dirname(os.path.dirname(__file__))
>> This will ensure that all enthought.* modules imported from then on
>> will only be from within the parent directory of enstaller.
>> I don't think I'd recommend this to anyone in the general case, but
>> this might be a reasonable workaround if you truly want to
>> "de-namespace" the package. (It will *not*, however, prevent new
>> eggs from being added to __path__ if you add anything to sys.path or
>> the working set afterward.)
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