Does anyone know why I keep getting this error? I'm really new and I'd appreciate someone's help. This is my code:
import turtle as t
import math as m
import random as r
raindrops = int(input("Enter the number of raindrops: "))
def drawSquare():
t.up()
t.goto(-300,-300)
t.down()
t.fd(600)
t.lt(90)
t.fd(600)
t.lt(90)
t.fd(600)
t.lt(90)
t.fd(600)
t.lt(90)
def location():
x = (r.randint(-300, 300))
y = (r.randint(-300, 300))
t.up()
t.goto(x, y)
return x, y
def drawRaindrops(x, y):
t.fillcolor(r.random(), r.random(), r.random())
circles = (r.randint(3, 8))
radius = (r.randint(1, 20))
newradius = radius
area = 0
t.up()
t.rt(90)
t.fd(newradius)
t.lt(90)
t.down()
t.begin_fill()
t.circle(newradius)
t.end_fill()
t.up()
t.lt(90)
t.fd(newradius)
t.rt(90)
while circles > 0:
if x + newradius < 300 and x - newradius > -300 and y + newradius < 300 and y - newradius > -300:
t.up()
t.rt(90)
t.fd(newradius)
t.lt(90)
t.down()
t.circle(newradius)
t.up()
t.lt(90)
t.fd(newradius)
t.rt(90)
newradius += radius
circles -= 1
area += m.pi * radius * radius
else:
circles -= 1
return area
def promptRaindrops(raindrops):
if raindrops < 1 or raindrops > 100:
print ("Raindrops must be between 1 and 100 inclusive.")
if raindrops >= 1 and raindrops <= 100:
x, y = location()
area = drawRaindrops(x, y)
area += promptRaindrops(raindrops - 1)
return x, y, area
def main():
t.speed(0)
drawSquare()
x, y, area = promptRaindrops(raindrops)
print('The area is:', area, 'square units.')
main()
t.done()
I'm assuming something is wrong with the "+=" but I have no idea what. I'm fairly certain that the area is correctly being returned. Help please. :)
Two things I noticed:
promptRaindrops returns a tupleI am sure you didn't intend this, but when you say area += promptRaindrops(raindrops - 1), you are adding a tuple to area, which is an integer. To fix this, you should say area += promptRaindrops(raindrops - 1)[2] to get the area returned. However, your error is generated by
In promptRaindrops, you return a recursive call of the function whenever 1 <= raindrops <= 100. But, when it is outside that range, it returns nothing, only prints a message. Your function will always be outside of that range, because if you keep decreasing the value passed in to promptRaindrops, it will eventually go below 1. When it does, you return None (since you didn't return anything). That None bubbles up through every single recursion call made to that point, and you will inevitably be adding None to area. Add a return statement returning a tuple, and your error should vanish.
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