使用 pip 安裝第三方庫時，報錯：
You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
使用：pip install --upgrade pip 命令時，出現異常：
Installing collected packages: pip
Found existing installation: pip 9.0.3
Uninstalling pip-9.0.3:
Exception:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/shutil.py", line 544, in move
os.rename(src, real_dst)
PermissionError: [Errno 13] Permission denied: '/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip-9.0.3.dist-info/DESCRIPTION.rst' -> '/var/folders/jw/d3_slty13w37lv03q_lly96m0000gn/T/pip-q73ghl27-uninstall/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip-9.0.3.dist-info/DESCRIPTION.rst'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/req/req_set.py", line 778, in install
requirement.uninstall(auto_confirm=True)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/req/req_install.py", line 754, in uninstall
paths_to_remove.remove(auto_confirm)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/req/req_uninstall.py", line 115, in remove
renames(path, new_path)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip/utils/__init__.py", line 267, in renames
shutil.move(old, new)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/shutil.py", line 559, in move
os.unlink(src)
PermissionError: [Errno 13] Permission denied: '/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip-9.0.3.dist-info/DESCRIPTION.rst'
You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
解決方案：
使用：
sudo pip install --upgrade pip