Using Python 3 on a mac

setting_python3_on_mac

1. use brew to install it : 
  > brew install python
2. this installs python3 however it did not link it got the following error: 
   Linking /usr/local/Cellar/python/3.7.2_2... Error: Permission denied @ dir_s_mkdir - /usr/local/Frameworks
    the user here was that there was no Frameworks directory under /usr/local, I use the following to fix this:
  > cd /usr/local  
  > sudo makedir Frameworks
  > sudo chown $(whoami):admin /usr/local/Frameworks
  > brew link python
 3.getting pip install ( for me this was not install, the following work,i also needed to set path to call pip)
  > curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
  > python get-pip.py
  > sudo nano /etc/paths
   the above command opens the path file, i enter the following:
   
   usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/bin
   - Hit control-x to quit.
   - Enter “Y” to save the modified buffer.
   
   `Experience issues installing pipenv, by doing this was I got this to work`
   > sudo -H pip install -U pipenv
   
   - this will install pipenv, this will allow you to create a env, to test, create a directory and cd into
   > pinenv install [name of package]
   - to test, just create a py file, to run this file do the following
   > pipenv run python3 [name of file].py
   
  Use this for more advance examples
  https://docs.python-guide.org/dev/virtualenvs/#virtualenvironments-ref
  this fix the issue for me