If you recently installed python and its not setting latest path you may need to use following method to install python correctly in unix systems. Most of the users intend to create symlinks replacing python 2 with python 3 and its not a proper way to switch the versions. For that you can use pyenv and change desired python version easily.

1. Install pyenv using brew.

Use homebrew to install pyenv in your os.

brew install pyenv

2. Install desired python version

You can check python versions from here https://www.python.org/downloads/. Once you have determined your version you can install it by using pyenv

pyenv install 3.9.9

After installing the python version you nee to select the version as the global

pyenv global 3.9.9
pyenv version
>> 3.9.9 (set by /Users/user/.pyenv/version)
python -V
>> Python 3.9.9

3. Add variables to your shell

First determine your shell executing following command in the terminal

 ps -p $$

Then enter following variables and commands in the relevant config file. Since my shell is zsh I will be editing ~/.zshrc. If its bash you can edit .bash_profiles file.

export PYENV_ROOT="$HOME/.pyenv"
export PATH="$PYENV_ROOT/bin:$PATH"
export PIPENV_PYTHON="$PYENV_ROOT/shims/python"

plugin=(
  pyenv
)

eval "$(pyenv init --path)"
eval "$(pyenv init -)"

Finally source your config file.

source ~/.zshrc 
// or
source ~/.bash_profiles

Thats it. Next time when you open the terminal the values will be read from the config file and working by default