我的代码出现未知错误

Question

由于某些原因，这给了我一个无效的语法错误，在所有定义的函数（在它们内部）和我真的很困惑的帮助。我不确定什么是错的，所以任何帮助对我都有帮助。非常感谢你们。

代码：

from turtle import*
x=0
y=0
#by importing using 'from' lets you minimise the need to write turtle.forward

"""
forward (50) # moves the turtle forward 50 steps
right (90) # turns the turtle to the right 90 degress
pencolor("red")  # sets the pencolor.  Needs to be written before drawing the shape
fillcolor("blue")    #always needs to be written before begin fill 
fillcolor("#FF0000")  #fills with a hexadecimal color
colormode(255) #changes the color fill option to use 0-255 rather than values from 0-1.
fillcolor(0,255,0) #shows how to use R G B values (to fill with red in this case)
begin_fill()  #needs to be written before you begin drawing a shape
end_fill()  #needs to be written after you have finished drawing a shape
pensize(10) # needs to be used before giving draw commands
penup() # allows the turtle to be moved to other locations without drawing
bgcolor("orange") # fills the background of the whole drawing canvas
pendown() # normally the pen is down from the start but you may need to use pendown after lifting the penup
speed(5) #from 0 to 10, 0 being the fastest.  You need to specify the speed before writing the drawing instructions
done() # completes the drawing
"""

# start your code here

def turtleForward():
    print("How far forward do you want to go?")
    forward = input()
    forward ((int(forward))
    print("Want to go forward again?  (y) (n)")
    moreForward = input()
    if moreForward == y:
        turtleFoward()



def turtleRight():
    print("How far right do you want to go?")
    right = input()
    right ((int(right))
    print("Want to go right again?  (y) (n)")
    moreRight = input()
    if moreRight == y:
        turtleRight()


def turtleLeft():
    print("How far left do you want to go?")
    left = input()
    left ((int(left))
    print("Want to go left again?  (y) (n)")
    moreLeft = input()
    if moreLeft == y:
        turtleLeft()

def penColour():
    print("What pen colour would you like?")
    colour = input()
    pencolor (colour)


def menu():
    print("""Option 1. Set pen colour.
Option 2. Go forward.
Option 3. Go right.
Option 4. Go left.
Option 5. Quit.""")
    optionChoice = input()
    if optionChoice == '1':
        pencolour()
    elif optionChoice == '2':
        turtleForward()
    elif optionChoice == '3':
        turtleRight()
    elif optionChoice == '4':
        turtleLeft()
    elif optionChoice == '5':
        x = 1







print("Hello. Welcome to the turtle program I have made.")
while x == y:
    menu()

Answer 1

这一行上有一个开括号太多：

forward ((int(forward))
#       12   3       32

在开始时删除一个：

forward(int(forward))
#      1   2       21

否则Python直到 next 行才会知道缺少某些内容。

你又犯了两次同样的错误：

right ((int(right))

和

left ((int(left))

下一个问题是你试图为turtle函数和局部变量使用相同的名称：

forward = input()
forward(int(forward))

这不起作用; Python现在在引用input()时会看到来自forward的字符串结果。从input()函数a 不同的名称中提供结果：

steps = input()
forward(int(steps))

同样，这也适用于其他两个功能。

下一个问题是，当您询问用户是否想继续前进时：

print "Want to go forward again?  (y) (n)"
moreForward = input()
if moreForward == y:
    turtleFoward()

您正在与那里的全局y变量进行比较，而不是字符串 'y'。你可能也不想在这里使用递归;更好地做一个循环：

def turtleForward():
    while True:
        steps = input("How far forward do you want to go? ")
        forward(int(steps))
        moreForward = input("Want to go forward again?  (y) (n)")
        if moreForward.lower() != 'y':
            return

Answer 2

forward ((int(forward))

这是错误的一行，您必须删除这样的括号：

forward (int(forward))

Answer 3

工作代码

    from turtle import*
    x=0
    y=0
    #by importing using 'from' lets you minimise the need to write turtle.forward

    """
    forward (50) # moves the turtle forward 50 steps
    right (90) # turns the turtle to the right 90 degress
    pencolor("red")  # sets the pencolor.  Needs to be written before drawing the shape
    fillcolor("blue")    #always needs to be written before begin fill 
    fillcolor("#FF0000")  #fills with a hexadecimal color
    colormode(255) #changes the color fill option to use 0-255 rather than values from 0-1.
    fillcolor(0,255,0) #shows how to use R G B values (to fill with red in this case)
    begin_fill()  #needs to be written before you begin drawing a shape
    end_fill()  #needs to be written after you have finished drawing a shape
    pensize(10) # needs to be used before giving draw commands
    penup() # allows the turtle to be moved to other locations without drawing
    bgcolor("orange") # fills the background of the whole drawing canvas
    pendown() # normally the pen is down from the start but you may need to use pendown after lifting the penup
    speed(5) #from 0 to 10, 0 being the fastest.  You need to specify the speed before writing the drawing instructions
    done() # completes the drawing
    """

    # start your code here

    def turtleForward():
        print("How far forward do you want to go?")
        forward = input()
        forward (int(forward))
        print "Want to go forward again?  (y) (n)"
        moreForward = input()
        if moreForward == y:
            turtleFoward()



    def turtleRight():
        print("How far right do you want to go?")
        right = input()
        right (int(right))
        print "Want to go right again?  (y) (n)"
        moreRight = input()
        if moreRight == y:
            turtleRight()


    def turtleLeft():
        print("How far left do you want to go?")
        left = input()
        left (int(left))
        print "Want to go left again?  (y) (n)"
        moreLeft = input()
        if moreLeft == y:
            turtleLeft()

    def pencolour():
        print("What pen colour would you like?")
        colour = input()
        pencolor (colour)


    def menu():
        print("""Option 1. Set pen colour.
    Option 2. Go forward.
    Option 3. Go right.
    Option 4. Go left.
    Option 5. Quit.""")
        optionChoice = str(input())
        if optionChoice == '1':
            pencolour()
        elif optionChoice == '2':
            turtleForward()
        elif optionChoice == '3':
            turtleRight()
        elif optionChoice == '4':
            turtleLeft()
        elif optionChoice == '5':
            x = 1







    print("Hello. Welcome to the turtle program I have made.")
    while x == y:
        menu()