C:\Users\adaba>pip install -U scikit-learn
Collecting scikit-learn
Using cached scikit_learn-0.18.1-cp27-cp27m-win_amd64.whl
Installing collected packages: scikit-learn
Found existing installation: scikit-learn 0.17.1
DEPRECATION: Uninstalling a distutils installed project (scikit-learn) has been deprecated and will be removed in a future version. This is due to the fact that uninstalling a distutils project will only partially uninstall the project.
Uninstalling scikit-learn-0.17.1:
Exception:
Traceback (most recent call last):
File "C:\Program Files\Anaconda2\lib\site-packages\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "C:\Program Files\Anaconda2\lib\site-packages\pip\commands\install.py", line 317, in run
prefix=options.prefix_path,
File "C:\Program Files\Anaconda2\lib\site-packages\pip\req\req_set.py", line 736, in install
requirement.uninstall(auto_confirm=True)
File "C:\Program Files\Anaconda2\lib\site-packages\pip\req\req_install.py", line 742, in uninstall
paths_to_remove.remove(auto_confirm)
File "C:\Program Files\Anaconda2\lib\site-packages\pip\req\req_uninstall.py", line 115, in remove
renames(path, new_path)
File "C:\Program Files\Anaconda2\lib\site-packages\pip\utils\__init__.py", line 267, in renames
shutil.move(old, new)
File "C:\Program Files\Anaconda2\lib\shutil.py", line 303, in move
os.unlink(src)
WindowsError: [Error 5] Access is denied: 'c:\\program files\\anaconda2\\lib\\site-packages\\scikit_learn-0.17.1-py2.7.egg-info'