[Python-Dev] Request for Pronouncement: PEP 441 (original) (raw)

[Python-Dev] Request for Pronouncement: PEP 441 - Improving Python ZIP Application Support

Barry Warsaw barry at python.org
Tue Feb 24 21:32:46 CET 2015

On Feb 24, 2015, at 08:20 PM, Paul Moore wrote:

(side note: --python/-p or --interpreter/-i?) and set the entry point,

Both virtualenv and (I think) pex use --python/-p so that seems to be the overwhelming trend .

To modify an archive could be done using

python -m zipapp old.pyz new.pyz [-p interpreter] Default is to strip the shebang (no -p option). There's no option to omit the target and do an inplace update because I feel the default action (strip the shebang from the existing file with no backup) is too dangerous.

You have to be careful about the case where old.pyz == new.pyz (e.g. either handling this case safely or complaining loudly) , but also you could handle it by using a .tmp file and renaming. E.g. old.pyz -> old.pyz.bak and old.pyz.tmp -> old.pyz.

3. What to call the "show the shebang line" option

I don't know how useful this is, given that (on *nix at least) you can effectively do the same with head(1).

Cheers, -Barry

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