TypeError:Vector()不接受任何参数

Question

我正在尝试实现上面Vector类中的set_x、set_y、init和str方法，此测试的输出应该是：

#Vector: x=4, y=4
#Vector: x=5, y=5
#Vector: x=3, y=7
#Vector: x=3, y=7

class Vector:
def __init__(self, x, y):   self.x = x   self.y = y
def set_x(self,x):   set_x = x
def set_y(self,y):   set_y = y
def __str__(self):   return ("Vector: x=%s, y=%s", set_x, set_y)
#__init__ and __str__ v1=Vector(4,4) print(v1)
#Important Remark 
#v1.x,v1.y =4,4 # should return an error since x and y are private
# test set_x and set_y v1.set_x(5) v1.set_y(5) print(v1)
v1.set_x(1) v1.set_y(9) print(v1)
# test __init__ again print(Vector(1,9))

Answer 1

我相信这就是你想要做的：

class Vector:
def __init__(self, x, y):
self.x = x
self.y = y
def set_x(self, x):
self.x = x
def set_y(self, y):
self.y = y
def __str__(self):
return f"Vector: x={self.x}, y={self.y}"
v1 = Vector(1, 9)
print(v1)