[ Python 常見問題 ] How to pass dictionary items as function arguments in python?

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Question 
As title. I have a function as below: 

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1. def my_function(first, last, age, middle=''):  
2.      print "My name is %s %s (%s) and I am %d years old" % (first, last, middle, age)  

How do I pass data as dict into my_function (With key as argument name and value as argument value). For example: 

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1. data_dict = {"first":"Lee", "last":"John", "middle":"KC", "age":18}  

How-To 
Check below usage: 

>>> data_dict = {"first":"Lee", "last":"John", "middle":"KC", "age":18}
>>> my_function(**data_dict)
My name is Lee John (KC) and I am 18 years old
>>> data_list = ["Lin", "Ken"]
>>> data_dict2 = {"age":33}
>>> my_function(*data_list, **data_dict2)
My name is Lin Ken () and I am 33 years old

More on how to use function in Python, please refer to "[Quick Python] 9. Functions"