pip version that works with kivy code example

Example: what version of python supports kivy

As of version 1.8. 0 Kivy supports both Python >= 2.7 and Python >= 3.4 with the same codebase. Python 3 is also now supported by python-for-android. However, be aware that while Kivy will run in Python 3.4+, our iOS build tools still require Python 2.7.