禁用从网站包读取

$ cd python_test_venv/
$ python3.6 -m venv env
$ . env/bin/activate
$ which pip
~/python_test_venv/env/bin/pip
$ pip -V
pip 9.0.1 from [...]/python_test_venv/env/lib64/python3.6/site-packages (python 3.6)
$ pip install javapackages
Requirement already satisfied: javapackages in [...]/python2.7/site-packages

为什么会这样

1) 它是从站点包读取的吗?每 the documentation ,确定是否应访问此文件的标志为False。

2) 它从旧版Python的站点包中读取?