As someone who has much more experience with Python, the only time I reach for Python is the odd case where there isn't a comparable Go library (think pyqt). Writing Go programs is just easier than Python--the language is much simpler, static typing is a huge boon, documentation for all packages is available at godoc.org in a consistent format, great standard library, single-binary deployment, great concurrency, more performant, standard formatting, standard testing tools, better static analysis support (IDEs can autocomplete, for example), etc.