[Nix-dev] Using/packaging Python-modules

[Roland Koebler]

Hi Freddy,

thanks.
Unfortunately, toolz is still not available in the nix-shell. Any Ideas?


On Wed, Dec 21, 2016 at 03:51:01PM +0100, Freddy Rietdijk wrote:
> I couldn't find
> >   - http://nixos.org/nixpkgs/manual/#ssec-python-development
> >    This anchor des not exist; maybe #development-mode is meant.
> Could you tell me where you found this?
In the last lines of your commit-diff, or:

8.10.1.3.1. Develop local package
As a Python developer you’re likely aware of development mode (python
setup.py develop); instead of installing the package this command
creates a special link to the project code. That way, you can run
updated code without having to reinstall after each and every change
you make. Development mode is also available on Nix as
[explained](http://nixos.org/nixpkgs/manual/#ssec-python-development)
in the Nixpkgs manual. Let’s see how you can use it. 

Changing the link to (http://nixos.org/nixpkgs/manual/#development-mode)
would fix this.


Best regards
Roland


> On Wed, Dec 21, 2016 at 3:18 PM, Roland Koebler <
> rk-list at simple-is-better.org> wrote:
> 
> > Hi,
> >
> > I'm trying to create nix-packages from some of my own Python-modules.
> > So, I followed the Nixpkgs manual, but it did not work as described:
> >
> > Section 8.10.1.2.1. Python packaging on Nix:
> >
> > - 1st shell.nix-example: local toolz package [1]
> >
> >   1. variable "licenses" is not found:
> >
> >      user at host:~/tmp/_$ nix-shell
> >      error: undefined variable ‘licenses’ at /home/rk/tmp/_/shell.nix:15:15
> >      (use ‘--show-trace’ to show detailed location information)
> >
> >   2. after removing the license-line, I can start a nix-shell, but the
> > toolz
> >      package is not available:
> >
> >      user at host:~/tmp$ nix-shell
> >      ...
> >      [nix-shell:~/tmp]$ which python3.5
> >      /nix/store/c5c9fs9vh12rr0lvbss1a813xwlwv0
> > zh-python3-3.5.2/bin/python3.5
> >
> >      [nix-shell:~/tmp]$ python3.5
> >      Python 3.5.2 (default, Jun 25 2016, 21:38:40)
> >      [GCC 5.4.0] on linux
> >      Type "help", "copyright", "credits" or "license" for more information.
> >      >>> import toolz
> >      Traceback (most recent call last):
> >        File "<stdin>", line 1, in <module>
> >      ImportError: No module named 'toolz'
> >
> > - 2nd shell.nix-examle: local toolz package + numpy [2]
> >
> >   1. variable "licenses" is not found (as above)
> >   2. tests fail:
> >
> >         ...
> >         ============================================================
> > ==========
> >         ERROR: exceptions (unittest.loader._FailedTest)
> >         ------------------------------------------------------------
> > ----------
> >         AttributeError: module 'toolz.curried' has no attribute
> > 'exceptions'
> >
> >         ============================================================
> > ==========
> >         ERROR: exceptions (unittest.loader._FailedTest)
> >         ------------------------------------------------------------
> > ----------
> >         AttributeError: module 'toolz.curried' has no attribute
> > 'exceptions'
> >
> >         ------------------------------------------------------------
> > ----------
> >         Ran 2 tests in 0.001s
> >
> >         FAILED (errors=2)
> >         builder for ‘/nix/store/pa77cfky1b0f2knzn2k2czdaxz6wdym6-python3.5-toolz-0.7.4.drv’
> > failed with exit code 1
> >         cannot build derivation ‘/nix/store/pi89rb0v178avb0jjdm352vad42a1f7a-python3-3.5.2-env.drv’:
> > 1 dependencies couldn't be built
> >         error: build of ‘/nix/store/pi89rb0v178avb0jjdm352vad42a1f7a-python3-3.5.2-env.drv’
> > failed
> >         /home/user/.nix-profile/bin/nix-shell: failed to build all
> > dependencies
> >
> >
> > So, how can I develop with local Python packages or package local Python
> > modules?
> >
> >
> > Additionally, I've found several broken links:
> >   I found several broken links:
> >   - buildPythonPackage https://github.com/NixOS/nixpkgs/blob/master/pkgs/
> > development/python-modules/generic/default.nix
> >   - http://pythonhosted.org/setuptools/setuptools.html#development-mode
> >     should probably point to http://setuptools.readthedocs.
> > io/en/latest/setuptools.html#development-mode
> >   - http://nixos.org/nixpkgs/manual/#ssec-python-development
> >     This anchor des not exist; maybe #development-mode is meant.
> >   - A link-checker (https://validator.w3.org/checklink) reported even
> > more broken links.
> >
> > best regards
> > Roland
> >
> >
> > [1]
> > with import <nixpkgs> {};
> >
> > pkgs.python35Packages.buildPythonPackage rec {
> >   name = "toolz-${version}";
> >   version = "0.7.4";
> >
> >   src = pkgs.fetchurl{
> >     url = "mirror://pypi/t/toolz/toolz-${version}.tar.gz";
> >     sha256 = "43c2c9e5e7a16b6c88ba3088a9bfc82f7db8e13378be7c78d6c14a5f8ed0
> > 5afd";
> >   };
> >
> >   meta = {
> >     homepage = "http://github.com/pytoolz/toolz/";
> >     description = "List processing tools and functional utilities";
> >     license = licenses.bsd3;
> >     maintainers = with maintainers; [ fridh ];
> >   };
> > }
> >
> >
> > [2]
> > with import <nixpkgs> {};
> >
> > ( let
> >     toolz = pkgs.python35Packages.buildPythonPackage rec {
> >       name = "toolz-${version}";
> >       version = "0.7.4";
> >
> >       src = pkgs.fetchurl{
> >         url = "mirror://pypi/t/toolz/toolz-${version}.tar.gz";
> >         sha256 = "43c2c9e5e7a16b6c88ba3088a9bfc8
> > 2f7db8e13378be7c78d6c14a5f8ed05afd";
> >       };
> >
> >       meta = {
> >         homepage = "http://github.com/pytoolz/toolz/";
> >         description = "List processing tools and functional utilities";
> >         license = licenses.bsd3;
> >         maintainers = with maintainers; [ fridh ];
> >       };
> >     };
> >
> >   in pkgs.python35.withPackages (ps: [ps.numpy toolz])
> > ).env
> >
> >
> >
> > _______________________________________________
> > nix-dev mailing list
> > nix-dev at lists.science.uu.nl
> > http://lists.science.uu.nl/mailman/listinfo/nix-dev
> >

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