Using Python to manipulate the GUI's of other programs?

Question

I have a program here that has an entry box and a button.

I want python to enter a string into the entry box, then press the button. What is the best way of going a

Answer 1

PyAutoGUI (installable through pip) can automate mouse/keyboard and works on Mac/Windows/Linux.

It also has some basic screenshot image recognition capabilities like Sikuli has.

https://pypi.python.org/pypi/PyAutoGUI