Question

我有一个问题，我无法从导入的模块中导入变量。

from Turtle import Turtle
from Turtle import *
from PIL import Image
import random
f = open("Lab11Data.txt", "w")
img=Image.new('RGB',(640,480),(255,255,255))
for i in range(800):
   global newPixels
   t = Turtle(img,320,450,90,(0,0,0))
   n = 50
   for i in range(9):
      t.move(n)
      x = random.randint(1,2)
      if x == 1:
         t.turn(15)
      if x == 2:
         t.turn(-15)
      n-=1
   f.write(str(newPixels))
   f.write("\n")
img.save("Lab11Image.png")

我已经导入了模块Turtle（不是python的turtle），并且我试图从那里使用一个变量。

from PIL import Image
from math import sin, cos, pi

class Turtle:
   def __init__(self, im, x = 0, y = 0, deg = 0, color = (0, 0, 0)):
      self.im = im
      self.x = x
      self.y = y
      self.deg = deg
      self.color = color

   def turn(self, degs):
      self.deg = (self.deg + degs) % 360

   def move(self, dist):
      newPixels = 0
      i = 0
      while i < dist:
         if self.im.getpixel((int(self.x), int(self.y))) != self.color:
            self.im.putpixel((int(self.x), int(self.y)), self.color)
            newPixels += 1
         self.x += cos(self.deg * pi / 180)
         self.y -= sin(self.deg * pi / 180)
         i += 1
      return newPixels

我不断收到一个名称错误，提示未定义相关的变量。错误：

Traceback (most recent call last):
  File "Lab11.py", line 20, in <module>
    f.write(str(newPixels))
NameError: global name 'newPixels' is not defined

使用导入模块的类中的变量

0 个答案: