Can't unpack values of dictionary with **

[Snake]

I've seen similar examples in 4.7.5 Unpacking argument lists, but my somehow don't work.

>>> d={'USA':'Washington','France':'Paris','China':'Beijing'}
	  
>>> **d
	  SyntaxError: invalid syntax

Also:

>>> def f(a,b,c):
	  print(a,b,c)
	  
>>> f(**d)
	  
Traceback (most recent call last):
  File "<pyshell#33>", line 1, in <module>
    f(**d)
TypeError: f() got an unexpected keyword argument 'USA'