[Python-Dev] zipimport & import hooks (original) (raw)

Kevin Jacobs jacobs@penguin.theopalgroup.com
Fri, 6 Dec 2002 08:59:41 -0500 (EST)

On 6 Dec 2002, Martin v. [iso-8859-15] L=F6wis wrote:

Kevin Jacobs <jacobs@penguin.theopalgroup.com> writes: =20 > for filename in os.listdir(path[0]): > if not filename.endswith('.py') or filename.startswith(''):_ > continue [...] > Clearly, the above code can be redone in a much nicer way that doesn'= t > depend on path, the qualified base package name, and import. =20 That would break only if the package becomes part of a zipfile, right? And, if it is in a zipfile, it breaks no matter what mechanism we find for zipfile imports, since it relies on os.listdir to obtain the package contents, right?

Yup -- which is why I've just added an item to our task queue to avoid th= e filesystem entirely for this kind of code.

> 2) They don't care if Python stores objects, strings, or bananas in > sys.path, so long as=20 >=20 > sys.path=3Dmap(str,sys.path)=20 >=20 > results in a human-readable path and does not change how imports= occur. =20 For Just's patch, that is only true for zipfile imports. If you would also provide URL, or .tgz import with his patch, then you'll loose the magic when converting the path back to strings.

Hmmm. I haven't looked that closely at Just's proposal. Why should .tgz= or http://xyz be treated any differently than .zip?

> 3) They all want ZIP archives to be a builtin feature, but don't ca= re if > they have to write an extra line of code to register a TAR/BZ2/w= hatever > import hook. =20 Clearly, with Jim's patch, they'ld only get zipfile import, period.

The sentiment seemed to be that zipfiles were an 80% solution and the res= t was icing on the cake. Of course, as their boss, I can overrule them and say that I also need an import mechanism that can also gracefully support cryptographically signed modules (native and in zipfiles) too. ;)

-Kevin

-- Kevin Jacobs The OPAL Group - Enterprise Systems Architect Voice: (216) 986-0710 x 19 E-mail: jacobs@theopalgroup.com Fax: (216) 986-0714 WWW: http://www.theopalgroup.com