Write a script/function/program that converts a user inputted number or Roman numeral to its equivalent?

2014 11 6
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更新时间：2014 11 6
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1) Write a script/function/program that converts a user inputted number or Roman numeral to its equivalent.
Recall Roman Numerals where:
I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000
Also remember IX is 9 (10 - 1) while XI = 11 (10+1) but XIX = 19 (10+9)
Most likely you will use the following function: str = input('Roman numeral: ','s')
Just to clarify -- your program should prompt a user to convert a Roman numeral into it’s numerical equivalent or take a number and output the equivalent Roman numeral.

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