On 21 jan, 11:49, "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote: > > Diez, > > > I repeat I am a newbie, so please don't be angry against me, if I say > > something stupid or if I propose a method not efficient. > > Where did I sound angry? > > > An easy way to get the absolute path of site-packages seems very > > useful to me, in order to check anything (all extensions available and > > not provided by sys.path, etc.) related to the files on the > > filesystem, if necessary. > > As I said - this is a wrong assumption. The whole purpose of the sys.path is > to specify locations where modules/packages are installed. Note the plural. > > And matter of factly (as I told you in the last post already), this happens > in e.g. debian based distributions install certain packages > under /usr/share, which is by no means a prefix of /usr/python2.5 where the > site-packages are. > > So if you want to find out if something is already installed, you need to > consider ALL the contents of sys.path. > > Besides, I don't understand why you want to do it that way anyway. If you > need a certain package, do > > try: > import package > except ImportError: > do_install_package() > > This should/could be part of your installer script (most probably setup.py) > > And have you heard of setuptools? They do actually manage and install > pytthon packages with dependencies. Before reinventing another wheel... > > > For the automatic installation of missing extensions (using admin > > rights), I think that it is not difficult to do it on both > > platforms... > > You are underestimating that task. It is, on both platforms. There are many > discussions about this, why some people don't like setuptools because it > works with python as center of it's perspective whereas linux often has > package management for the whole system. > > I suggest you start acquainting yourself with setuptools and how and what > they did to essentially solve what you seem to be wanting. And try and see > if that's not a route you can go - just using setuptools. > > Diez
OK 5/5, I will follow your advices ! I will read the manuals distutils and setuptools... I use Ubuntu 7.10 and I have seen a package named python-setuptools 0.6c6-1 ready to install. The description of this package is Python Distutils Enhancements Extensions to the python-distutils for large or complex distributions. -- http://mail.python.org/mailman/listinfo/python-list
