“ python”命令找不到Python2安装

Question

我已经在MacOS机器上搞砸了python安装。

这是-

REMs-MBP:opt rem$ which python
/usr/bin/python
REMs-MBP:opt rem$ python
-bash: /usr/local/opt/python/libexec/bin/python: No such file or directory
REMs-MBP:opt rem$ which python2
/Library/Frameworks/Python.framework/Versions/2.7/bin/python2
REMs-MBP:opt rem$ python2
Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 12:01:12) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

python2可以正常工作，但是默认的python不能正常工作。

我该如何解决？

brew install python默认尝试安装python3。我需要使用python2.7作为默认设置。

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更新：

pip仍指向python3安装。

PREMs-MBP:opt prem$ which python
/usr/bin/python
PREMs-MBP:opt prem$ pip
-bash: /usr/local/bin/pip: /usr/local/Cellar/python/3.7.0/bin/python3.7: bad interpreter: No such file or directory