我正在尝试编写一个绘制Spirograph的Python龟程序,我不断收到此错误:
Traceback (most recent call last):
File "C:\Users\matt\Downloads\spirograph.py", line 36, in <module>
main()
File "C:\Users\matt\Downloads\spirograph.py", line 16, in main
spirograph(R,r,p,x,y)
File "C:\Users\matt\Downloads\spirograph.py", line 27, in spirograph
spirograph(p-1, x,y)
TypeError: spirograph() missing 2 required positional arguments: 'x' and 'y'
>>>
这是代码:
from turtle import *
from math import *
def main():
p= int(input("enter p"))
R=100
r=4
t=2*pi
x= (R-r)*cos(t)-(r+p)*cos((R-r)/r*t)
y= (R-r)*sin(t)-(r+p)*sin((R-r)/r*t)
spirograph(R,r,p,x,y)
def spirograph(R,r,p,x,y):
R=100
r=4
t=2*pi
x= (R-r)*cos(t)-(r+p)*cos((R-r)/r*t)
y= (R-r)*sin(t)-(r+p)*sin((R-r)/r*t)
while p<100 and p>10:
goto(x,y)
spirograph(p-1, x,y)
if p<10 or p>100:
print("invalid p value, enter value between 10 nd 100")
input("hit enter to quite")
bye()
main()
我知道这可能有一个简单的解决方案,但我真的无法弄清楚我做错了什么,这是我的计算机科学1课程中的练习,我不知道如何修复错误。
答案 0 :(得分:6)
回溯的最后一行告诉您问题所在:
File "C:\Users\matt\Downloads\spirograph.py", line 27, in spirograph
spirograph(p-1, x,y) # <--- this is the problem line
TypeError: spirograph() missing 2 required positional arguments: 'x' and 'y'
在您的代码中,spirograph()
函数有5个参数:def spirograph(R,r,p,x,y)
,R
,r
,p
,x
, y
。在错误消息中突出显示的行中,您只传递了三个参数p-1, x, y
,并且因为这与函数所期望的不匹配,所以Python会引发错误。
我还注意到你正在覆盖函数体中的一些参数:
def spirograph(R,r,p,x,y):
R=100 # this will cancel out whatever the user passes in as `R`
r=4 # same here for the value of `r`
t=2*pi
这是一个简单的例子:
>>> def example(a, b, c=100):
... a = 1 # notice here I am assigning 'a'
... b = 2 # and here the value of 'b' is being overwritten
... # The value of c is set to 100 by default
... print(a,b,c)
...
>>> example(4,5) # Here I am passing in 4 for a, and 5 for b
(1, 2, 100) # but notice its not taking any effect
>>> example(9,10,11) # Here I am passing in a value for c
(1, 2, 11)
由于您始终希望将此值保留为默认值,因此您可以从函数的签名中删除这些参数:
def spirograph(p,x,y):
# ... the rest of your code
或者,你可以给他们一些默认值:
def spirograph(p,x,y,R=100,r=4):
# ... the rest of your code
由于这是一个分配,其余部分取决于你。
答案 1 :(得分:1)
错误告诉您使用的参数太少,无法调用spirograph
更改此代码:
while p<100 and p>10:
goto(x,y)
spirograph(R,r, p-1, x,y) # pass on the missing R and r
你没有使用这些参数,但是你仍然必须让它们去调用它。