TypeError：开始必须是整数

Question

I am trying to draw five turtles, but I am getting a TypeError on line 25. Here is my code:

import turtle

wn = turtle.Screen() 
redrose = turtle.Turtle()

color = input("What will your background color be?")
fillcolor_f = input("What will the color of your rose be?")

redrose.hideturtle()
redrose.speed(30)

redrose.penup()
redrose.left(180)
redrose.forward(175)
redrose.right(90)
redrose.forward(30)
redrose.right(90)
redrose.pendown()

def drawRose(red): 
    redrose.color("pink")
    redrose.fillcolor(fillcolor_f)
    redrose.fill(True)

    for i in range(red):
        redrose.forward(i)
        redrose.right(49)
    for i in range(5):
        drawRose(redrose)
        redrose.penup()
        redrose.forward(350)
        redrose.right(144)
        redrose.pendown()

    redrose.fill(False)


drawRose(50)
wn.bgcolor(color)

I am trying to draw five roses, but it produces errors. I am doing this in interactivepython.org.

Answer 1

You are recursively calling drawRose with the wrong parameter. On the line 23 ( for i in range(red): ) you expect red to be an integer, which is it, when first called on line 36 ( drawRose(50) ). But then on line 27 ( drawRose(redrose) ) you are passing in the redrose object, which is a turtle. It is not clear to me exactly what you should pass in there. I doubt that you even want to call it recursively. I suspect you actually want another function like drawPetal .