Question

我在这方面看到了多个问题，但未能找到问题的答案。基本上我只想在图像上绘制一条线，从python中的外部文件中获取坐标。这是我的代码：

import Image, ImageDraw
import sys
import csv
im = Image.open("screen.png")
draw = ImageDraw.Draw(im)
with open("outputfile.txt") as file: 
   reader = csv.reader(file, delimiter=' ')
   for row in reader:
      if row[0] == 'H':
        print "Horizontal line" 
        endx = row[2]
        endy = int(row[3])+int(row[1])
      elif row[0] == 'V':
        print "Vertical line"
        endx = row[2]+row[1]
        endy = row[3]
      x = row[2]
      y = row[3]
      draw.line((x,y, endx,endy), fill = 1)
   im.show()

一切都有效，除了这一行：

draw.line((x,y, endx,endy), fill = 1)

我看到以下错误：

File "dummy_test.py", line 21, in <module>
draw.line((x,y, endx,endy), fill = 1)
File "/Library/Python/2.7/site-packages/PIL-1.1.7-py2.7-macosx-10.10-       intel.egg/ImageDraw.py", line 200, in line
self.draw.draw_lines(xy, ink, width)
SystemError: new style getargs format but argument is not a tuple

如果我对值进行硬编码，我认为没有问题。问题仅发生在上述情况。有谁可以指出这个问题？

Answer 1

此消息通常意味着尝试传递预期元组的单独值。

尽管pillow doc：

xy - 像[（x，y），（x，y），...]或数字这样的2元组的序列值如[x，y，x，y，...]。

你应该坚持这个版本：

draw.line([(x, y), (endx, endy)], fill = 1)

Answer 2

看起来只有少数int(...)丢失了？

--- a.py.ORIG   2016-09-14 20:54:47.442291244 +0200
+++ a.py    2016-09-14 20:53:34.990627259 +0200
@@ -1,4 +1,4 @@
-import Image, ImageDraw
+from PIL import Image, ImageDraw
 import sys
 import csv
 im = Image.open("screen.png")
@@ -8,13 +8,13 @@
    for row in reader:
       if row[0] == 'H':
         print "Horizontal line" 
-        endx = row[2]
+        endx = int(row[2])
         endy = int(row[3])+int(row[1])
       elif row[0] == 'V':
         print "Vertical line"
-        endx = row[2]+row[1]
-        endy = row[3]
-      x = row[2]
-      y = row[3]
+        endx = int(row[2])+int(row[1])
+        endy = int(row[3])
+      x = int(row[2])
+      y = int(row[3])
       draw.line((x,y, endx,endy), fill = 1)
    im.show()

ImageDraw.draw.line（）：SystemError：新样式的getargs格式，但参数不是元组

2 个答案: