试图在Python Turtle图形上添加IntergerMath

因为我已经完成了平均值和距离的编码:

x1=eval(input("Please insert a first number: "))
y1=eval(input("Please insert a second number: "))
x2=eval(input("Please insert a third number: "))
y2=eval(input("Please insert a fourth number: "))
add = x1
add = add + y1
add = add + x2
add = add + y2
average = add/4
d= distanceFormula(x1,y1,x2,y2)
print("Average:", average)
print("Distance:", d)

我现在正在添加图形,将条形图上的intergermath与python turtle图形连接起来。然而,我在键入此代码(输入)时遇到了一些问题:

def doBar(height, clr):
   begin_fill()
   color(clr)
   setheading(90)
   forward(height)
   right(90)
   forward(40)
   right(90)
   end_fill()

y_values = [str(y1), str(y2)]
x_values = [str(x1), str(x2)]
colors= ["red", "green", "blue", "yellow"]
up()
goto(-300, -200)
down()
idx = 0
for value in y_values:
    doBar(value, colors[idx])
    idx += 1

以下是输出结果,在正常运行后,我得到了一些错误:

Traceback (most recent call last):
 in main
 doBar(value, colors[idx])
 in doBar
 forward(height)
 line 1637, in forward
 self._go(distance)
 line 1604, in _go
 ende = self._position + self._orient * distance
 line 257, in __mul__
 return Vec2D(self[0]*other, self[1]*other)
TypeError: can't multiply sequence by non-int of type 'float'

那么,我如何使这段代码在图形上工作呢?