如何通过easy_install安装软件包？我不想使用虚拟环境。
有人会认为我可以做到这一点
easy_install --prefix=/opt/pypy/site-packages pytz
但我得到以下内容：
easy_install --prefix=/opt/pypy/site-packages pytz
TEST FAILED: /opt/pypy/site-packages/lib/python2.7/site-packages does NOT support .pth files
error: bad install directory or PYTHONPATH
You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from. The
installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:
/opt/pypy/site-packages/lib/python2.7/site-packages
and your PYTHONPATH environment variable currently contains:
':/fu/classes'
Here are some of your options for correcting the problem:
* You can choose a different installation directory, i.e., one that is
on PYTHONPATH or supports .pth files
* You can add the installation directory to the PYTHONPATH environment
variable. (It must then also be on PYTHONPATH whenever you run
Python and want to use the package(s) you are installing.)
* You can set up the installation directory to support ".pth" files by
using one of the approaches described here:
https://pythonhosted.org/setuptools/easy_install.html#custom-installation-locations
Please make the appropriate changes for your system and try again.