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Jan Tojnar
2018-12-24 15:02:29 +01:00
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doc/languages-frameworks/python.section.md
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@@ -484,10 +484,12 @@ and in this case the `python35` interpreter is automatically used.
### Interpreters
Versions 2.7, 3.5, 3.6 and 3.7 of the CPython interpreter are available as
respectively `python27`, `python35`, `python36`, and `python37`. The PyPy
interpreter is available as `pypy`. The aliases `python2` and `python3`
correspond to respectively `python27` and `python37`. The default interpreter,
`python`, maps to `python2`. The Nix expressions for the interpreters can be
respectively `python27`, `python35`, `python36` and `python37`. The aliases
`python2` and `python3` correspond to respectively `python27` and
`python37`. The default interpreter, `python`, maps to `python2`. The PyPy
interpreters compatible with Python 2.7 and 3 are available as `pypy27` and
`pypy3`, with aliases `pypy2` mapping to `pypy27` and `pypy` mapping to
`pypy2`. The Nix expressions for the interpreters can be
found in `pkgs/development/interpreters/python`.
All packages depending on any Python interpreter get appended
@@ -1102,7 +1104,7 @@ on `numpy` will be built with `mkl`.
The following is an overlay that configures `numpy` to use `mkl`:
```nix
self: super: {
python36 = super.python36.override {
python37 = super.python37.override {
packageOverrides = python-self: python-super: {
numpy = python-super.numpy.override {
blas = super.pkgs.mkl;
@@ -1112,6 +1114,15 @@ self: super: {
}
```
`mkl` requires an `openmp` implementation when running with multiple processors.
By default, `mkl` will use Intel's `iomp` implementation if no other is
specified, but this is a runtime-only dependency and binary compatible with the
LLVM implementation. To use that one instead, Intel recommends users set it with
`LD_PRELOAD`.
Note that `mkl` is only available on `x86_64-{linux,darwin}` platforms;
moreover, Hydra is not building and distributing pre-compiled binaries using it.
## Contributing
### Contributing guidelines