（windows）在一台新的电脑没安装 Python ，只是从旧电脑 copy 了虚拟环境的文件夹进去，可以单独运行脚本吗？

把虚拟环境的 scripts 目录下所有 text 格式的文件中路径都更改了；如果安装 python 的话，虚拟环境运行里面的脚本 ok，但是把 python 卸载掉，就会报错：

Failed to import the site module
Traceback (most recent call last):
  File "C:\Users\E\Desktop\moduleTest\venv\lib\site.py", line 791, in <module>
    main()
  File "C:\Users\E\Desktop\moduleTest\venv\lib\site.py", line 768, in main
    paths_in_sys = addsitepackages(paths_in_sys)
  File "C:\Users\E\Desktop\moduleTest\venv\lib\site.py", line 280, in addsitepackages
    addsitedir(sitedir, known_paths)
  File "C:\Users\E\Desktop\moduleTest\venv\lib\site.py", line 211, in addsitedir
    addpackage(sitedir, name, known_paths)
  File "C:\Users\E\Desktop\moduleTest\venv\lib\site.py", line 179, in addpackage
    exec(line)
  File "<string>", line 1, in <module>
  File "C:\Users\E\Desktop\moduleTest\venv\lib\importlib\util.py", line 13, in <module>
    from contextlib import contextmanager
ImportError: No module named 'contextlib'