我尝试更新django-cms，现在出现错误：
from cms.models import CMSPlugin
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "C:\Program Files\JetBrains\PyCharm 2017.3.2\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 20, in do_import
module = self._system_import(name, *args, **kwargs)
ImportError: No module named 'cms.models'
似乎软件包已损坏。我尝试卸载以重新安装，但是在卸载时出现错误： 例外：
Traceback (most recent call last):
File "C:\Python34\lib\shutil.py", line 527, in move
os.rename(src, real_dst)
FileNotFoundError: [WinError 3] The system cannot find the path specified: 'c:\\users\\rando\\ops3\\lib\\site-packages\\cms\\test_utils\\project\\extensionapp\\migrations\\__pycache__\\0003_multitablepageextension_multitablepageextensionparent_multitabletitleextension_multit
abletitleextens.cpython-34.pyc' -> 'C:\\Users\\rando\\AppData\\Local\\Temp\\pip-uninstall-z4by4lt8\\users\\rando\\ops3\\lib\\site-packages\\cms\\test_utils\\project\\extensionapp\\migrations\\__pycache__\\0003_multitablepageextension_multitablepageextensionparent_multitablet
itleextension_multitabletitleextens.cpython-34.pyc'
如果我尝试安装-它认为它已经存在。
关于如何重新安装软件包的任何建议？