Mac下安装pip和pylint遇到的坑

工作需要使用Python，OS X自带Python 2.7，需要安装pip和pylint。

1. 安装pip

使用homebrew安装可能会提示不能安装pip，所以使用Mac自带的Python工具easy_install进行安装：

    sudo easy_instatll pip

安装过程可能需要fq。

2. 安装pylint

直接使用pip安装pylint会提示权限错误：

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/isort'

这是因为对目录没有权限，此时不要试图使用sudo命令，请使用下面的语句安装：

    pip install pylint --user 

至此安装完毕。