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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def CPP_to_Python(s):
 """ Converts a C pre-processor expression into an equivalent Python expression that can be evaluated. """

    s = CPP_to_Python_Ops_Expression.sub(CPP_to_Python_Ops_Sub, s)
    for expr, repl in CPP_to_Python_Eval_List:
        s = expr.sub(repl, s)
    return s