Verwenden Sie PIP aus dem Innen -Skript

def install(package):
    try:
        __import__(package)
    except:
        import subprocess
        subprocess.call([sys.executable, "-m", "pip", "install", package, "--prefix="packages"])
.
.
.
sys.path.append("packages/lib/python2.7/site-packages/")
.
.
.
import art
.
.
.
structure