Mac系統pip安裝包的問題記錄

因為mac系統自帶2.7.3的python，就沒打算用3.x

然後使用系統自帶的python安裝一些包的時候，由於mac系統的sip系統完整性保護，不允許我解除安裝系統自帶的已經過時的包，因此無法更新安裝。

後來就在stack overflow上找到了乙個類似情況，使用

sudo pip install *** --upgrade --ignore-installed xx

pip install -u scikit-learn

collecting scikit-learn
downloading scikit_learn-0.18.2-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (7.5mb)
100% |████████████████████████████████| 7.5mb 87kb/s 
installing collected packages: scikit-learn
exception:
traceback (most recent call last):
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
status = self.run(options, args)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 784, in install
**kwargs
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 851, in install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 1064, in move_wheel_files
isolated=self.isolated,
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 345, in move_wheel_files
clobber(source, lib_dir, true)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 316, in clobber
ensure_dir(destdir)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/utils/__init__.py", line 83, in ensure_dir
os.makedirs(path)
file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/os.py", line 157, in makedirs
mkdir(name, mode)
oserror: [errno 13] permission denied: '/library/python/2.7/site-packages/scikit_learn-0.18.2.dist-info'

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