我已经安装了vps centos7。我正在使用python2.7运行一些脚本。但是问题出在某些目录中，我可以使用python通用模块（例如请求）。但是在根目录下，我无法导入python请求模块。它说没有模块名称 python请求 。但是我在VPS的另一个目录上使用它。
[root@madcodlab-centos7 site-packages]# ls
backports _dummy_thread ipaddress.pyc pushetta-1.0.15.dist-info terminaltables-3.1.0-py2.7.egg-info
backports.ssl_match_hostname-3.5.0.1-py2.7.egg-info easy_install.py ipaddress.pyo python_linux_procfs-0.4.9-py2.7.egg-info _thread
builtins easy_install.pyc libfuturize pyudev tkinter
certifi easy_install.pyo libpasteurize pyudev-0.15-py2.7.egg-info tuned
certifi-2019.3.9.dist-info examples _markerlib queue urlgrabber
chardet firewall _markupbase reprlib urlgrabber-3.10-py2.7.egg-info
chardet-3.0.4.dist-info future paho requests urllib3
configobj-4.7.2-py2.7.egg-info future-0.17.1-py2.7.egg-info paho_mqtt-1.4.0-py2.7.egg-info requests-2.22.0.dist-info urllib3-1.25.3.dist-info
configobj.py html past rpmUtils validate.py
configobj.pyc http pip setuptools validate.pyc
configobj.pyo idna pip-8.1.2-py2.7.egg-info setuptools-0.9.8-py2.7.egg-info validate.pyo
copyreg idna-2.8.dist-info pkg_resources.py slip winreg
decorator-3.4.0-py2.7.egg-info iniparse pkg_resources.pyc slip-0.4.0-py2.7.egg-info xmlrpc
decorator.py iniparse-0.4-py2.7.egg-info pkg_resources.pyo slip.dbus-0.4.0-py2.7.egg-info yum
decorator.pyc ipaddress-1.0.16-py2.7.egg-info procfs socketserver
decorator.pyo ipaddress.py pushetta terminaltables
[root@madcodlab-centos7 site-packages]# python
Python 2.7.16 (default, May 24 2019, 21:44:39)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import requests
>>> exit()
[root@madcodlab-centos7 site-packages]# cd
[root@madcodlab-centos7 ~]# python
Python 2.7.16 (default, May 24 2019, 21:44:39)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> ex
>>> import requests
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named requests
>>>
我从网上到处搜索并厌倦了很多解决方案，但似乎无济于事。
which python产生/usr/local/bin/python
网站软件包目录为/usr/lib/python2.7/site-packages