from __future__ import annotations
import sys
from pathlib import Path

def in_virtualenv() -> bool:
    return sys.prefix != getattr(sys, "base_prefix", sys.prefix)

print("python:", sys.version.split()[0])
print("executable:", Path(sys.executable))
print("prefix:", sys.prefix)
print("virtualenv:", in_virtualenv())
if not in_virtualenv():
    print("Create one with: python -m venv .venv")