Question

问题：编写一个程序，从文件中读取数字序列，并将它们显示在图形屏幕上的网格中。对于此程序，您可以假设每行有4行，每行不超过4个条目。每行的条目用逗号分隔。

例如，考虑一个包含以下内容的文件：

12,13,14,15
8,9,10,11
4,5,6,7
0,1,2,3

这是我的计划：

from turtle import*

def file():
  filename = input("Please enter a filename: ")
  openfile = open(filename, "r")
  readlines = openfile.readlines()

  for lines in readlines:
    nums = lines.strip().split(",")

  return nums

def turtle(n):
  row = 0
  wn = Screen()
  pen = Turtle()
  wn.setworldcoordinates(-0.5,3.5,4.5,-1.0)
  row = row + 1
  pen.up()
  for i in range(len(n)):
    pen.goto(i,row)
    pen.write(i, font=("arial", 30))
  row = row + 1


def main():
  y = file()
  w = turtle(y)


main()

此程序正在运行，但它只打印文件中的最后一行编号。请帮忙！

Answer 1

from turtle import*

def file():
    filename = "t.txt"
    openfile = open(filename, "r")
    readlines = openfile.readlines()
    nums=[]
    for lines in readlines:
        nums.append(lines.strip().split(","))

    return nums

def turtle(n):
    print(n)
    row = 0
    col = 0
    wn = Screen()
    pen = Turtle()
    wn.setworldcoordinates(-0.5,3.5,4.5,-1.0)

    pen.up()
    for numberRow in n:
        for number in numberRow:
            pen.goto(col,row)
            pen.write(number, font=("arial", 30))
            col+=1
        row += 1
        col = 0

def main():
    y = file()
    w = turtle(y)


main()
r = input()

Answer 2

这是代码的工作版本。注意mainloop（）调用从turtle import *，也取消注释第一个with语句并摆脱第二个with语句是你想要用户输入。您的代码，没有正确关闭文件。那绝不是好形式。使用with语句可确保您打开的文件最后关闭。 Python善于回收内存，但你永远不应该把它留给机会，这是确保你回忆起来的好形式。

def file():
  #with open(input("Please enter a filename: "), 'r') as data: 
  with open('test.txt', 'r') as data:
    nums = []
    for lines in data.readlines():
      nums.append(lines.strip().split(","))
  return nums

def turtle(n):
  wn = Screen()
  pen = Turtle()
  wn.setworldcoordinates(-0.5,3.5,4.5,-1.0)
  row = 0
  col = 0
  pen.up()
  for ele in n:
    for i in ele:
      pen.goto(row, col)
      pen.write(i, font=("arial", 30))
      row += 1
    row = 0
    col += 1
  mainloop() 


def main():
  y = file()
  w = turtle(y)

main()

编写一个程序，读取一个用逗号分隔的数字的文件，然后将这些数字打印到海龟屏幕上

2 个答案: