Upgrade all the things!

upgrade_python.sh

#!/bin/bash
# Upgrade applications on system
brew update
brew upgrade --all

# Install latest python versions
pyenv install 2.7.11
pyenv install 3.5.1

# Make sure pip is up to date in new python versions
PYENV_VERSION=2.7.11 pip2 install -U pip
PYENV_VERSION=3.5.1 pip3 install -U pip

# Copy requirements
pip2 freeze --local | grep -v '^\-e' | cut -d = -f 1  | PYENV_VERSION=2.7.11 xargs pip2 install -U
pip3 freeze --local | grep -v '^\-e' | cut -d = -f 1  | PYENV_VERSION=3.5.1 xargs pip3 install -U

# Switch global versions to latest
pyenv global 2.7.11 3.5.1

# Update all packages
pip2 freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs pip2 install -U
pip3 freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs pip3 install -U