Python Forum

zip(*np.where(myarray == 0))

what does the * in front of np denote in a syntax

In general,

func(*param)

means that param is a sequence of python objects (eg a list, tuple, ...) and these objects are used as parameters in the call to function func. For example

param = [1, 2, 3]
func(*param)

has the same effect as calling

func(1, 2, 3)

Calling func(*param) is different from calling func(param), because the latter calls func with a single list argument, namely

func([1, 2, 3])