how to make python3 default mac code example

Example 1: use python3 as default mac

ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python

Example 2: set python3 as default mac

# it is said not to do but I used it anyway, because of the conveniency
$ echo "alias python=/usr/local/bin/python3.7" >> ~/.zshrc

Example 3: mac catallina python3

$ brew install pyenv

Example 4: set python 3 as default mac

[ -e ~/.profile ] && . ~/.profile

Example 5: how to change mac default python version

$ echo -e 'if command -v pyenv 1>/dev/null 2>&1; then\n  eval "$(pyenv init -)"\nfi' >> ~/.zshrc