Python script that makes its own nix-shell

example.py

#! /usr/bin/bash                                                                       
"""":
# if Nix not installed, install it, then rerun this script with nix-shell              
[ -f /etc/nix/nix.conf ] || curl -L https://nixos.org/nix/install | sh -s -- --daemon
exec nix-shell --command "python $0 $@" \
     -p python311 \
     -p python3Packages.numpy
# add any package you want above and they will be added to the shell                   
exit 1
""" #"

import numpy
print(numpy.array([1,2,3]))

Thanks for sharing! In your example, a new Python 3.11 interpreter is installed? Also, you show that packages can be installed (like numpy in the example). Where are those things installed? Are they persistent between runs of the script (saving execution time) or they have to be reinstalled each time (saving disk space)?

nix installs itself in /nix/store/ it then installs python311 and and packages in there. each package goes in its own uniquely named subfolder, does not conflict with anything, and does not change any system config file. the script is run in a shell that only exposes declared dependencies.

…

On Wed, Jan 31, 2024, 20:29 Alexandre B A Villares ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Thanks for sharing! In your example, a new Python 3.11 interpreter is installed? Also, you show that packages can be installed (like numpy in the example). Where are those things installed? Are they persistent between runs of the script (saving execution time) or they have to be reinstalled each time (saving disk space)? — Reply to this email directly, view it on GitHub <https://gist.github.com/mdipierro/8a7f7d55df6330f776d45ed2bbcdb6c1#gistcomment-4864670> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHLZTZUCJIZVSE7GT5CMUDYRMK4DBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTENZXG4ZTGOBSU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .