sys.argv[1]. IndexError: list index out of range

Question

I want to find out the similarity between 2 images but I'm getting this error

if __name__ == '__main__':
  img1 = sys.argv[0]
  img2 = sys.argv[1]

  # Create image objects
  image1 = Image.open(img1)
  image2 = Image.open(img2)

  # Test pixel by pixel
  get_image_pixel_similarity(img1, img2)

sys.argv[1]. IndexError: list index out of range

How can I sort out my problem?

How do you run the script? Also: sys.argv[0] is the script's name; you need sys.argv[1] and sys.argv[2]. — phd, Jun 10 '17 at 12:41

tupui · Answer 1 · 2017-06-10T15:34:18.270

0

Th command you type must be:

python script.py img1 img2

Then, you have to use:

img1 = sys.argv[1]
img2 = sys.argv[2]

I suggest you do this in one line:

img1, img2 = sys.argv[1:2]

argv is a list that start with the script name.

edited Jun 10 '17 at 15:34

answered Jun 10 '17 at 12:43

tupui

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If `1` is out of range then `1:` is even more out of range ... – jadsq Jun 10 '17 at 12:46
Or `img1, img3 = sys.argv[1:2]` to evade issues if there are not 2 items in `sys.argv`. – Jun 10 '17 at 14:14

sys.argv[1]. IndexError: list index out of range

1 Answers1