* Robert Kern (Sat, 24 Nov 2007 16:33:37 -0600) > Thorsten Kampe wrote: > > can anyone give me a short code snippet how to install a missing > > module via setuptools (assuming setuptools is already installed)?! > > > > Something like this: > > > > try: > > import missing_module > > except import_error > > import setuptools > > setuptools.whatever.install(missing_module) > > The recommended way to handle dependencies using setuptools is to specify them > in the install_requires metadata in the setup() function call in your > setup.py:
It's just a simple script - no package. So I don't even have a setup.py. > However, if you have special needs that really do require downloading the > dependency at runtime instead of install-time: > > # > http://peak.telecommunity.com/DevCenter/PkgResources#workingset-methods-and-attributes > > import pkg_resources > pkg_resources.resolve('some_package >= 1.0') > pkg_resources.resolve('another_package') > > import some_package > import another_package [5]>>> pkg_resources.working_set.resolve('betterprint') ---------------------------------------------------------------------- ----- AttributeError Traceback (most recent call last) F:\program files\python\<ipython console> in <module>() F:\program files\python\lib\site-packages\setuptools-0.6c5-py2.5.egg \pkg_resou rces.py in resolve(self=<pkg_resources.WorkingSet object at 0x01457710>, requi rements=['n', 'i', 'r', 'p', 'r', 'e', 't', 't', 'e', 'b'], env=None, installe r=None) 472 # Ignore cyclic or redundant dependencies 473 continue --> 474 dist = best.get(req.key) dist = undefined best.get = <built-in method get of dict object at 0x016BC660> req.key = undefined 475 if dist is None: 476 # Find the best distribution and add it to the map AttributeError: 'str' object has no attribute 'key' -- http://mail.python.org/mailman/listinfo/python-list
