Mac下pip 安装 常见问题

1.pip安装出现权限错误

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error: could not create '/System/Library/Frameworks/Python.framework/Versions/2.7/share': Operation not permitted

出现这个是因为macOS Sierra搞了奶啊的SIP机制(System Integrity Protection)，真是闲的蛋疼，所以

a) 方案一：直接把sip给关闭了，简单点，把你关了
重启电脑，按住Command+R(直到出现苹果标志)进入Recovery Mode(恢复模式)
左上角菜单里找到实用工具 -> 终端
输入csrutil disable回车
重启Mac即可

b) 方案二：不那么粗暴，温柔点，把你留着

pip install (package name) --user -U

2.出现如下错误

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方法:

用H标志

sudo -H pip install xxx

3.安装PIL出现如下错误

Collecting pil Could not find a version that satisfies the requirement pil (from versions: ) Some externally hosted files were ignored as access to them may be unreliable (use --allow-external pil to allow).No matching distribution found for pil

方法:

后来查了解决办法：见 http://stackoverflow.com/questions/19532125/cant-install-pil-after-mac-os-x-10-9
使用如下步骤pip install Pillow

4.安装LXML出现如下错误

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方法:

sudo C_INCLUDE_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2:/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2/libxml:/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MaOSX10.12.sdk/usr/include pip install lxml