def ReturnIf(expre=bool, a=None, b=None):
    """
    Es-Retorna un if ternario con una expresion boleana y dos retornos.
    
    En-Returns a ternary if with a boolean expression and two returns.

    test:

    >>> ReturnIf(5 > 4,"a","b")
    'a'
    """
    if expre:
        return a
    return b
