[Greg Ward] > The only import hook I'm familiar with is Quixote, where we have > defined a Python dialect called PTL (Python Template Language, > used to embed HTML [or other text] in Python). Install Quixote's > import hook, and you can import .ptl files just like .py files. > It's very handy. Out of curiosity, does anyone know of any other > import hooks like this out there -- ie. import something that is > not strictly Python. (It sounds like most import hooks/hacks > deal with the location of the .py files to import. Quixote > doesn't touch that, but it adds the ability to import > not-quite-Python source files.) I know of import hooks like that, but in 1000+ emails from Installer users, no one has ever attempted to distribute an app that uses one. If the hook writes out a .pyc, then the hook is pretty much developer-only, anyway. > Note that my experience of this in Java was largely negative, > because Java doesn't have a standard way of putting .class files > in the filesystem (AFAIK) -- so everything has to be in a .jar > file, and those .jar files can be anywhere you please. Huh? Jar files don't date from day 1 - for .class files it works almost like Python. > So you > end up with a mile-long CLASSPATH that's very fragile and forever > needing fixing. As long as most Python modules are accessed the > ordinary way (files in a directory), then Python won't have a > problem. But if somebody makes a Python installation with > "stdlib.zip", "distutils.zip", "mxDateTime.zip", etc. etc., then > the poor users will be in the same boat as Java users. I think the only difference is that Python goes to considerable effort (and expense) to work out a sys.path before considering PYTHONPATH. - Gordon
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