On Mon, Sep 19, 2016 at 9:25 AM, אלעזר <elaz...@gmail.com> wrote:
> Many proposals to add something to stdlib are rejected here with the > suggestion to add such library to pypi first. As noted by someone, pypi is > not as reachable as stdlib, and one should install that package first, > which many people don't know how. Additionally, there is no natural > distinction between 3rd party dependencies and in-project imports (at least > in tiny projects). > > This can be made easier if the first line of the program will declare the > required library, and executing it will try to download and install that > library if it is not installed yet. > yes, these are issues, but having a module or script download an install something jsut to run is a really bad idea! I handle it with something like: try: import some_package except ImportError: print("""This package requires "some_package": if you do not have it installed, it can be installed with pip: $ python -m pip install my_package YOu can find more information aobut mypacakge at: http://github.com/my_package """) raise Where I've done this has been with ugly optional dependencies -- I don't want to force the user to install the dep simply to run the code, if they are not using features that require it, so I dont put it in teh requiremetns in setup.py (Or conda, or...), But it's nice to get a reasonable message if the user tries to use a feature that does require that dependency. note also that we don't want to force people to use pip to install packages -- they may use conda, or the system package manager, or want to install from source, or.... -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov
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