call an executable string from python

I'm trying to find a way to run an executable script that can be downloaded from the web from Python, without saving it as a file. The script can be python code or bash or whatever - it should execute appropriately based on the shebang. I.e. if the following were saved in a file called script, then I want something that will run ./script without needing to save the file:

#!/usr/bin/env python3
import sys
from my_module import *

scoped_hash = sys.argv[1]
print(scoped_hash)

I have a function that reads such a file from the web and attempts to execute it:

def execute_artifact(command_string):
    os.system('sh | ' + command_string)

Here's what happens when I call it:

>>> print(string)
'#!/usr/bin/env python3\nimport sys\nfrom my_module import *\n\nscoped_hash = sys.argv[1]\n\nobject_string = read_artifact(scoped_hash)\nparsed_object = parse_object(object_string)\nprint(parsed_object)\n'
>>> execute_artifact(string) 
sh-3.2$ Version: ImageMagick 7.0.10-57 Q16 x86_64 2021-01-10 https://imagemagick.org
Copyright: © 1999-2021 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC HDRI Modules OpenMP(4.5) 
Delegates (built-in): bzlib freetype gslib heic jng jp2 jpeg lcms lqr ltdl lzma openexr png ps tiff webp xml zlib
Usage: import [options ...] [ file ]

Bizarrely, ImageMagick is called. I'm not sure what's going on, but I'm sure there's a better way to do this. Can anyone help me?

from call an executable string from python