[Python-Dev] PEP 3149 thoughts (original) (raw)

Georg Brandl g.brandl at gmx.net
Sun Sep 5 20:16:57 CEST 2010

Am 05.09.2010 19:22, schrieb "Martin v. Löwis":

I know the PEP is accepted, but I would still like to see some changes/clarifications.

1. What is the effect of this PEP on Windows? Is this a Linux-only feature? If not, who is going to provide the changes for Windows? (More specifically: if this is indeed meant for Windows, and if no Windows implementation arrives before 3.2b1, I'd ask that the changes be rolled back, and integration is deferred until there is Windows support)

I don't think Windows support is planned or necessary; after all, isn't the default installation mode on Windows to install every Python version into its own root direction (C:\PythonXY)?

2. Why does the PEP recommend installing stuff into /usr/share/pyshared? According to the Linux FHS, /usr/share is for Architecture- independent data, see

http://www.pathname.com/fhs/pub/fhs-2.3.html#USRSHAREARCHITECTUREINDEPENDENTDATA In particular, it's objective is that you can NFS-share it across, say, both SPARC Linux and x86 Linux. I believe the PEP would break this, as SPARC and x86 executables would override each other.

Indeed. I think this is probably just an oversight and should be corrected in the PEP. However, it's the distributions' call anyway.

3. When the PEP recommends that stuff gets installed into pyshared, why does the patch then not implement this recommendation, but continues installing files into lib-dynload?

That section is talking about files installed by distributions, which need to take special steps to get everything into /usr/{lib,share}/pyshared; a standard out-of-the-tarball install will not change the way it is installed.

It may well be that Barry had his Ubuntu hat on a bit too firmly when writing that PEP :)

Georg

-- Thus spake the Lord: Thou shalt indent with four spaces. No more, no less. Four shall be the number of spaces thou shalt indent, and the number of thy indenting shall be four. Eight shalt thou not indent, nor either indent thou two, excepting that thou then proceed to four. Tabs are right out.

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