mac python install zlib not available

用brew install 3.4.4（python）时报

zipimport.ZipImportError: can't decompress data; zlib not available

的错误，采用以下两步解决。

1、macdeMacBook-Pro:~ mac$ xcode-select --install

xcode-select: error: command line tools are already installed, use "Software Update" to install updates

2、macdeMacBook-Pro:~ mac$ brew install zlib

Caveats

This formula is keg-only, which means it was not symlinked into /usr/local.

OS X already provides this software and installing another version in

parallel can cause all kinds of trouble.

Generally there are no consequences of this for you. If you build your

own software and it requires this formula, you'll need to add to your

build variables:

LDFLAGS: -L/usr/local/opt/zlib/lib

CPPFLAGS: -I/usr/local/opt/zlib/include