python - Pythonの条件文内で「または」を使用する：「ifx=="y"または"z"」

Question

def shapearea():
    shape = raw_input("What shape do you want to print? ")
    if shape == "triangle" or "Triangle":
        return trianglearea()

    elif shape == "circle" or "Circle":
        return circlearea()

    elif shape == "square" or "Square":
        return squarearea()
    else:
        shapearea()

shapearea()

このコードを使用すると、プログラムが壊れます。プログラムを登録するにはどうすればよいですか（たとえば）。

同じように「円」または「円」

Answer 1

if shape in ("triangle", "Triangle")

またはそれ以上に、

if shape.lower() == "triangle"

Answer 2

@jamylakの答えの代わりに、必要なものは次のとおりです。

if shape == "triangle" or shape == "Triangle":
    return trianglearea()

elif shape == "circle" or shape == "Circle":
    return circlearea()

elif shape == "square" or shape == "Square":
    return squarearea()

Answer 3

So the actual function should be:  
def shapearea():
shape = raw_input("What shape do you want to print? ")
        if shape == "triangle" or shape == "Triangle":
            return trianglearea()

    elif shape == "circle" or shape == "Circle":
        return circlearea()

    elif shape == "square" or shape == "Square":
        return squarearea()
    else:
        shapearea()

shapearea()