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Docs: improve Python expressions

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as it contained several mistakes and was just messy.
This commit is contained in:
Frederik Rietdijk 2016-11-08 12:42:53 +01:00
parent a4f2d339fe
commit 9cdfb33401
1 changed files with 6 additions and 6 deletions
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12
doc/languages-frameworks/python.md
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@ -655,9 +655,8 @@ when you try to install a second environment.
Create a file, e.g. `build.nix`, with the following expression
```nix
with import <nixpkgs> {};
with python35Packages;
python.withPackages (ps: with ps; [ numpy ipython ])
pkgs.python35.withPackages (ps: with ps; [ numpy ipython ])
```
and install it in your profile with
```
@ -669,14 +668,15 @@ Now you can use the Python interpreter, as well as the extra packages that you a
If you prefer to, you could also add the environment as a package override to the Nixpkgs set.
```
packageOverrides = pkgs: with pkgs; with python35Packages; {
myEnv = python.withPackages (ps: with ps; [ numpy ipython ]);
packageOverrides = pkgs: with pkgs; {
myEnv = python35.withPackages (ps: with ps; [ numpy ipython ]);
};
```
and install it in your profile with
```
nix-env -iA nixos.blogEnv
nix-env -iA nixpkgs.myEnv
```
We're installing using the attribute path and assume the channels is named `nixpkgs`.
Note that I'm using the attribute path here.
#### Environment defined in `/etc/nixos/configuration.nix`
@ -685,7 +685,7 @@ For the sake of completeness, here's another example how to install the environm
```nix
environment.systemPackages = with pkgs; [
(python35Packages.python.withPackages (ps: callPackage ../packages/common-python-packages.nix { pythonPackages = ps; }))
(python35.withPackages(ps: with ps; [ numpy ipython ]))
];
```