问类函数中参数的设置条件

EN

class Circle:
    def __init__(self, radius):
        if type(radius) == 'int' and radius > 0:
            self.radius = radius 
        else:
            print("Incorrect value for radius")

circle1 = Circle(2) #output: Incorrect value for radius
circle2 = Circle(-3) #output: Incorrect value for radius
circle3 = Circle('a') #output: Incorrect value for radius