shebang for python script?

shebang for python script?

[jgart]

Hi Guixers,

What's the current recommended way to do this in Guix?

#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p "python3.withPackages(ps: [ ps.numpy ])"
import numpy as np
a = np.array([1,2])
b = np.array([3,4])
print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")

Re: shebang for python script?

[jgart]

or this shebang pinned to a particular commit?

#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p "python3.withPackages(ps: [ ps.numpy ])"
#!nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/d373d80b1207d52621961b16aa4a3438e4f98167.tar.gz
import numpy as np
a = np.array([1,2])
b = np.array([3,4])
print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")

https://ryantm.github.io/nixpkgs/languages-frameworks/python/

Re: shebang for python script?

[zimoun]

Hi,
On Wed, 25 Jan 2023 at 06:09, "jgart" <jgart@dismail.de> wrote:

> What's the current recommended way to do this in Guix?
>
> #!/usr/bin/env nix-shell
> #!nix-shell -i python3 -p "python3.withPackages(ps: [ ps.numpy ])"
> import numpy as np
> a = np.array([1,2])
> b = np.array([3,4])
> print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")

Something like:

--8<---------------cut here---------------start------------->8---
#!/usr/bin/env -S guix shell python -- python3
import numpy as np
a = np.array([1,2])
b = np.array([3,4])
print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")
--8<---------------cut here---------------end--------------->8---

works for me.


And to answer your other question about specific revision, I would do:

--8<---------------cut here---------------start------------->8---
#!/usr/bin/env -S guix time-machine --commit=29efa27 -- shell python -- python3
import numpy as np
a = np.array([1,2])
b = np.array([3,4])
print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")
--8<---------------cut here---------------end--------------->8---

Cheers,
simon

Re: shebang for python script?

[jgart]

Hi, thanks!! 

Should we document this approach in the manual somewhere? 

If so, where would be a good place to mention how to do this?


> --8<---------------cut here---------------start------------->8---
> #!/usr/bin/env -S guix shell python -- python3
> import numpy as np
> a = np.array([1,2])
> b = np.array([3,4])
> print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")
> --8<---------------cut here---------------end--------------->8---
> 

> And to answer your other question about specific revision, I would do:
> 
> --8<---------------cut here---------------start------------->8---
> #!/usr/bin/env -S guix time-machine --commit=29efa27 -- shell python -- python3
> import numpy as np
> a = np.array([1,2])
> b = np.array([3,4])
> print(f"The dot product of {a} and {b} is: {np.dot(a, b)}")
> --8<---------------cut here---------------end--------------->8---
> 
> Cheers,
> simon

Re: shebang for python script?

[Simon Tournier]

Hi,

On ven., 27 janv. 2023 at 06:10, "jgart" <jgart@dismail.de> wrote:

> Should we document this approach in the manual somewhere? 

An attempt here: <https://issues.guix.gnu.org/61094>

Cheers,
simon

Re: shebang for python script?

[jgart]

> An attempt here: <https://issues.guix.gnu.org/61094>

Awesome!

Thanks for sending that. Much appreciated!

all best,

jgart