如何在特定python安装的sitepackages中通过pip安装python包？

Question

当我运行pip install fasteners时，它显示

Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: fasteners in ./.local/lib/python3.6/site-packages (0.15)
Requirement already satisfied: six in ./.local/lib/python3.6/site-packages (from fasteners) (1.15.0)
Requirement already satisfied: monotonic>=0.1 in ./.local/lib/python3.6/site-packages (from fasteners) (1.5)

该软件包安装在./.local/lib/python3.6/site-packages中

但是我想把它安装在/usr/bin/python2/site-packages

因为duplicity使用python2。在运行duplicity --version时，我得到could not import fasteners错误

Answer 1

尝试使用以下命令安装Python 2.7的紧固件：

sudo python2.7 -m pip install fasteners

如果出现No module named pip错误，请尝试：

sudo python2.7 -m ensurepip  default-pip

然后再次尝试安装紧固件

Answer 2

正如您在@Nathan Mills答案的评论部分所分享的，您得到的是SSL错误。我想你错过了一些LIB。请尝试安装以下库，然后使用您正在使用的命令重试

sudo apt-get install build-essential checkinstall 
sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

然后：

sudo python2.7 -m pip install fasteners

尝试：

sudo python2.7 -m pip install  index-url=http://pypi.python.org/simple/ fasteners