On Fri, 3 Dec 1999, Guido van Rossum wrote: >... > Great response. I think we know where we each stand. Please go ahead > with a new design. (That's trust, not carte blanche.) Accepted gratefully. Thx. > Just one thought: the more I think about it, the less I like > sys.importers: functionality which is implemented through > sys.importers must necessarily be placed either in front of all of > sys.path or after it. While this is helpful for "canned" apps that > want *everything* to be imported from a fixed archive, I think that > for regular Python installations sys.path should remain the point of > attack. In particular, installing a new package (e.g. PIL) should > affect sys.path, regardless of the way of delivery of the modules > (shared libs, .py files, .pyc files, or a zip archive). Okay. I'll design with respect to this model. To be explicit/clear and to be sure I'm hearing you right: sys.path may contain Importer instances. Given the name FOO, the system will step through sys.path looking for the first occurence of FOO (looking in a directory or delegating). FOO may be found with any number of (configurable) file extensions, which are ordered (e.g. ".so" before ".py" before ".isl"). > I'm not too worried about code that inspects sys.path and expects > certain invariants; that code is most likely interfering with the > import mechanism so should be revisited anyway. The Benevolent Dictator has spoken. So be it. :-) > On the lone .pyc issue: I'd like to see this disappear when using the > filesystem, I see no use for it there if we support .pyc files in zip > archives. No problem. This actually creates a simplification in the system, as I'm seeing it now. I'm also seeing opportunities for a code reorg which may work towards MAL's issues with performance. I hope to have something in two or three weeks. I also hope people can be patient :-), but I certainly wouldn't mind seeing some alternative code! Cheers, -g -- Greg Stein, http://www.lyra.org/
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