At 03:00 PM 7/13/2005 +0100, Paul Moore wrote:
On 7/12/05, Paul Moore
wrote: Given a Distribution object (maybe derived from a user's command line, maybe from selection off a GUI) I can "uninstall" the Distribution by simply removing the egg (file or directory).
Make sure you *only* do this to a directory if it has a '.egg' extension; otherwise you could delete a package installed using "develop"!
However, according to the documentation, before I delete files for "the currently installed version of a package", I need to run easy_install -m <package> to ensure that Python doesn't continue to search for it. So, three questions:
1. How can I tell from a Distribution instance if it is "the currently installed version"?
If its .path attribute matches an entry in sys.path. But you'd probably be better off manipulating easy-install.pth directly, via PthDistributions.
2. How can I do the equivalent of easy_install -m in code?
There's a PthDistributions class in setuptools.command.easy_install; look at it and the code that uses it. Unfortunately, this code is targeted for refactoring when pkg_resources gets refactored, but hopefully its API won't change much.
3. Can eggs be in site-packages, but not locatable via find_distribution?
Um, only if you don't look for them. I'm not sure I understand the question.
I can't see anything in the Distribution API documentation, and I'm a little hazy on what happens in the face of multiple Distributions of the same package, all in site-packages at once but only one "installed".
You mean only one "activated" (they're all "installed"). What happens is that when you find_distributions('site-packages') they will all be listed. However, when you find_distributions() on the path entry that makes a particular one current, that one will show up again.