On Thu, Nov 3, 2016 at 2:34 AM, Paul Moore <p.f.mo...@gmail.com> wrote:
> On 2 November 2016 at 23:08, Chris Barker <chris.bar...@noaa.gov> wrote: > > After all, you can use pip from within a conda environment just fine :-) > > In my experience (some time ago) doing so ended up with the "tangled > mess of multiple systems" you mentioned. well, yes, my experience too, as a of two years ago, -- which is why I'm taken the time make conda packages of all the pure python libs I need (and now that there is conda-forge, it's not a huge lift) > Conda can't uninstall > something I installed with pip, sure can't! -- though that's too much of a barrier -- it'll give you an error, and then you use pip to uninstall it. > and I have no obvious way of > introspecting "which installer did I use to install X?" And if I pip > uninstall something installed by conda, I break things. (Apologies if > I misrepresent, it was a while ago, but I know I ended up deciding > that I needed to keep a log of every package I installed and what I > installed it with if I wanted to keep things straight...) > > Has that improved? > yes, it has -- and lots of folks seem to have it work fine for them, though I"d say in more of a one-way street approach: - create a conda environment - install all the conda packages you need - install all the pip packages you need. you're done. And most conda packages of python packages are built "properly" with pip-compatible meta data, so a pip install won't get confused and think it needs to install a dependency that is already there. then you can export your environment to a yaml file that keeps track of which packages are conda, and which pip, and you (and your users) can re-create that environment reliably -- even on a different platform. I'm not trying to complain, I don't have any particular expectation > that conda "has to" support using pip on a conda installation. But I > do want to make sure we're clear on what works and what doesn't. I'm not the expert here -- honestly do try avoid mixing pip and conda -- but support for it has gotten a lot better. -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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