CODEWITHSUNDEEP
pythonopencvgrowl
Dan Tappin
Dan Tappin

Reputation: 3032

Adding a dynamic icon OpenCV image to Growl in Python

I added a Growl notification to my python app which also uses OpenCV. The basic ones work fine:

image = open('image.png', 'rb').read()

growl.notify(
        noteType = "Messages",
        title = "Title",
        description = "Description",
        icon = image,
        sticky = False,
        priority = 1,
)

Where image is just a plain old PNG.

Next I am trying to make a custom icon where I am adding some text (just numbers) to that PNG. After some searching came up with this:

image = cv2.imread('image.png',0)
 cv2.putText(image, text='40', org=(10,10),
     fontFace= cv2.FONT_HERSHEY_DUPLEX, fontScale=0.2, color=(0,0,0),
     thickness=2, lineType=cv2.LINE_AA)

called before the growl notification and I get this error:

  File "/usr/local/lib/python3.9/site-packages/gntp/notifier.py", line 133, in notify
    if icon:
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

I realize now that OpenCV converts this to some kind of array. How do I 'convert' this image back to a PNG etc. that growl is expecting. I am looking to NOT save the dynamic image each time but I can if that's the only way.

I am sure this is probably trivial but its not obvious to me with my beginners opencv and python knowledge. Also the solution does not need to be OpenCV based. It was just the first one I found.

Upvotes: 0

Views: 396

Answers (1)

j3st
j3st

Reputation: 352

In this line of your growl.notify call:

icon = image,

image is expected to be an icon URL path.

However, it looks like the image you create is actually an array, and Python doesn't know how to handle that when trying to see whether it is "true" or not here.

Upvotes: 0

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