windows mingw 中查看python 路徑

I was following certain instructions to install a package and ended up installing another version of python and creating symbolic links (the names I can't recall). Now when I hit python from terminal, it is pointing to /usr/local/python2.7/bin/python2.7. I need to reset the default python to /usr/bin/python. How to do that?

$ which python
/usr/bin/python
$ whereis python
python: /usr/bin/python2.7-config /usr/bin/python2.7 /usr/bin/python /etc/python2.7 /etc/python /usr/lib/python2.7 /usr/bin/X11/python2.7-config /usr/bin/X11/python2.7 /usr/bin/X11/python /usr/local/bin/python2.7 /usr/local/lib/python2.7 /usr/include/python2.7 /usr/share/python /usr/share/man/man1/python.1.gz
$ 
$ python
bash: /usr/local/python2.7/bin/python2.7: No such file or directory
$ 
$ /usr/bin/python
Python 2.7.3 (default, Dec 18 2014, 19:10:20) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 
$ sudo rm /usr/bin/python
$ sudo ln -s /usr/bin/python2.7 /usr/bin/python

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