Installing modules via setuptools in a script

Thorsten Kampe thorsten at thorstenkampe.de
Mon Nov 26 14:39:22 CET 2007


* Robert Kern (Mon, 26 Nov 2007 04:34:17 -0600)
> Thorsten Kampe wrote:
> > * 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.
[...]
> My apologies for misleading you. There is no easy way to do this. Here is a
> roundabout way which might be suitable for a throwaway hack script. If it's not
> a throwaway hack script, then please heed Ben's advice. Alternatively, just
> distribute betterprint along with your script and save yourself the headache.
> 
> 
> In [1]: import betterprint
> ---------------------------------------------------------------------------
> ImportError                               Traceback (most recent call last)
> 
> /Users/rkern/<ipython console> in <module>()
> 
> ImportError: No module named betterprint
> 
> In [2]: import pkg_resources
> 
> In [3]: from setuptools.dist import Distribution
> 
> In [4]:
> pkg_resources.working_set.resolve(pkg_resources.parse_requirements('betterprint'),
> installer=Distribution().fetch_build_egg)
> zip_safe flag not set; analyzing archive contents...
> 
> Installed /Users/rkern/betterprint-0.1-py2.5.egg
> Out[4]: [betterprint 0.1 (/Users/rkern/betterprint-0.1-py2.5.egg)]

Okay, works for me, thanks. Is there an option to have the downloaded 
module installed into the "site-packages" directory (and not into the 
current)?

Thorsten



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