Runtime install of PyPI package inside AWS Lambda function

index.py

import tempfile
from pathlib import Path
import subprocess
import sys


tmp_path = Path(tempfile.gettempdir())
packages = ['crhelper']
for package in packages:
    subprocess.check_call([
        sys.executable, "-m", "pip", "install", "--target={}".format(tmp_path), package
    ])
sys.path.append(str(tmp_path))


import crhelper