Simple example for using asterisks for unpacking variables

unpacking-kwargs-example2.py

# function with keyworded parameter
def func2(var1=None, var2=None, var3=None):
  print(var1, var2, var3)

# both function call are the identical
func2(var1='hello', var2='world', var3='!')
func2(**{'var1':'hello', 'var2':'world', 'var3':'!'})

# this one throw error
func2(**{'var1':'hello', 'var2':'world', 'var4':'!'})