Bootstraps a Python 3 installation on a new Mac.

bootstrap_python3_osx.sh

#/bin/sh

# ======================================================================
# 1. Click the spotlight icon
# 2. Type "terminal" and press enter
# 3. In the new window, type "gcc" and press enter
# 4. If another dialog appears, click Install and wait for completion
# 5. Click the spotlight icon
# 6. Type "terminal" and press enter
# 7. Copy all of the lines below this block
# 8. Switch to Terminal.app and paste the clipboard
# ======================================================================

which -a python3 && which -a pip3
if [ $? -ne 0 ]; then

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

  brew update
  brew install python3
  
fi

python3 -c '
import pip
import platform

python_version = platform.python_version()
pip_version = pip.__version__

assert python_version.startswith("3.")

print()
print("python %s" % python_version)
print("pip %s" % pip_version)
print()
'

which -a python3 && which -a pip3

If this works, you should be able to run something like:

$ pip3 install --upgrade DropTheBeat
$ DropTheBeat