Question

嘿，我正在尝试这个额外的信用档案，我已经附在这里了。

https://drive.google.com/file/d/0B_K2RFTege5uRF9IeGJiYllQbGs/view?usp=sharing

我正在使用Python 3.4.3

请从上面的列表中输入方向：上

请输入您想要采取的步数：5

Traceback (most recent call last):
  File "D:\Downloads\programming-assignment-5.py", line 63, in <module>
    main()

  File "D:\Downloads\programming-assignment-5.py", line 61, in main
    move_robot(direction,steps)

  File "D:\Downloads\programming-assignment-5.py", line 28, in move_robot
    start[1].append(int(step))
AttributeError: 'int' object has no attribute 'append'

这是我到目前为止的代码：

import math
import sys

def calculate_distance(pos1, pos2):
    pos1 = [x,y]
    pos2 = [x,y]
    #distance = math.sqrt((((-)**2)+((-)**2))


def command_list():
    print("Utilize  the folowing commands")
    print("Up, Down, Left, Right")
    print("press 'E' to Exit")

def move_robot(step_sequence,step):
    x = 0
    y = 0
    start = [0,0]
    #end = [x,y]
    #print(start)
    moveRobot = [["up"],["down"],["left"],["right"]]
    while step_sequence != "e":
        if moveRobot[0][0] == step_sequence:
            #x =  x + int(step)
            #start.append(int(step))
            start[1].pop(0)
            start.insert[1](step)

            print("you moved UP",step, "space")
            print(start)
        elif moveRobot[1][0] == step_sequence:
            print("You moved DOWN 1 space")
            down = 0
        elif moveRobot[2][0] == step_sequence:
            print("You moved LEFT 1 space")
            left = 0
        elif moveRobot[3][0] == step_sequence:
            print("You moved RIGHT 1 space")
            right = 0
        elif step_sequence == "e":
            sys.exit()
        elif step_sequence != (moveRobot[0][0] or moveRobot[1][0] or moveRobot[2][0] or moveRobot[3][0]):
            print()
            print("You have Entered an Invalid command.")
            print("Please enter one of the following commands.")
            print("Up, Down, Left, Right")
        print()
        step_sequence = str(input("Please enter a direction from the list above.: "))
        steps = int(input("Please enter how many steps you would like to take.: "))

        print(start)
    return


def main():
    command_list()
    print()
    direction = str(input("Please enter a direction from the list above.: "))
    steps = int(input("Please enter how many steps you would like to take.: "))

    move_robot(direction,steps)
    #calculate_distance(move_robot(direction,steps))
main()

Answer 1

if matrix[0][1] == command :

这将为您提供索引超出范围的错误，因为matrix是4x1二维列表，[0][1]只有4x2时才是有效坐标。

快速解决方法是切换每个坐标对的顺序，例如： [0][1]变为[1][0]。但你应该只使用一维列表，例如matrix = ["up", "down", "left", "right"]。然后，您的条件会简化为if matrix[0] == command:，if matrix[1] == command:等。或者，您根本不应该使用任何类型的列表，只需直接插入字符串文字，例如if command == "up":

Answer 2

使用更新的代码，您试图附加到int，您不能这样做，而是想要设置start[1] = int(step)

所以开头看起来像是：

while step_sequence != "e":
        if moveRobot[0][0] == step_sequence:
            #x =  x + int(step)
            start[1] = int(step)
            print("you moved UP",step, "space")
            print(start)

Answer 3

matrix是一个包含多个单元素数组的数组，因此您的索引是相反的：

if matrix[0][0] == command :
    print ("you moved up 1 space")
if matrix[0][1] == command :
    print ("you moved up 1 space")
if matrix[0][2] == command :
    print ("you moved up 1 space")
if matrix[0][3] == command :
    print ("you moved up 1 space")
if command == "c":
    sys.exit()

我收到一个追溯错误，我不明白为什么会发生这种情况

3 个答案: