def impostos (fact, domus):
    if domus == 'P':
        impost = 0.0
    else:
        if fact > 100:
            impost = 0.0
        elif 10 <= fact <= 100:
            impost = fact * 0.1
        elif 1 < fact < 10:
            impost = fact * 0.15
        else:
            impost = fact * 0.2
        if domus == 'E':
            impost = impost /2
    return impost