Maintainer status: unmaintained

I am not really using this project anymore and it would require some porting changes to newer nix apis. You can also use the nix eval --json --expr to get json output from nix and use the python json library to parse it again.

An example can be found here: https://github.com/Mic92/nix-update/blob/3143af043d4324ee4c6a91ff7294c5c34fe459b6/nix_update/eval.py#L77

If you want to adopt the project, drop an email at [email protected] or find on matrix in the nixos channel.

$ meson . build
$ ninja -C build

or:

$ nix-build

$ cd build/src
$ python3
>>> import nix
>>> nix.eval('(1 + a)', vars=dict(a=2))
3
>>> nix.eval("builtins.currentSystem")
'x86_64-linux'
>>> nix.eval("with import <nixpkgs> {}; lib.nixpkgsVersion")
'18.03.git.15c484a965a'