Entry the following command on your console.
sudo ln -nfs /usr/local/bin/idle3 /usr/local/bin/idle
sudo ln -nfs /usr/local/bin/pydoc3 /usr/local/bin/pydoc
sudo ln -nfs /usr/local/bin/python3 /usr/local/bin/python
sudo ln -nfs /usr/local/bin/python3-config /usr/local/bin/python-config
sudo ln -nfs /usr/local/bin/pip3 /usr/local/bin/pip
Finally, udpate your profile:
source ~/.bash_profies