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GIMP_wire_read error upon adding python script in correct folder

I am trying to learn GIMP 2.10.38 with python and I don't know either that well, so I tried adding a simple python script but it doesn't show up in GIMP at all. Here is the script I added:

#!/usr/bin/env python
from gimpfu import *

def simple_plugin(image, drawable):
    gimp.message("Hello from a simple plugin!")

register(
    "python-fu-simple-plugin",
    "Simple Plugin Test",
    "A simple test plugin",
    "Your Name",
    "Your Name",
    "2024",
    "<Image>/Filters/Simple Test",  # Or any menu location
    "RGB*",
    [],
    simple_plugin,
)

main()

The script is in the correct folder - confirmed that in preferences - folders - plug-ins Searching online I came across the --verbose argument and that led me to this error:

Querying plug-in: 'C:\Users\Prafulla\AppData\Roaming\GIMP\2.10\plug-ins\simplepy.py'
gimp-2.10: LibGimpBase-WARNING: gimp-2.10: gimp_wire_read(): error

I know it is a general error related to communication within GIMP but couldn't find enough information online. I have tried a reinstall already, but not tried deleting all folders manually yet. Any idea how I should proceed?

Solution

  • Your problem isn't the "wire-read" error (which has been showing in my Gimp console for years without being related to any trouble). In the same terminal output, you should also see this:

    Traceback (most recent call last):
  File "/path/to/your/file.py", line 17, in <module>
    simple_plugin,
TypeError: register() takes at least 11 arguments (10 given)

    The missing argument is the (usually empty) list of return values

    register(
    "python-fu-simple-plugin",
    "Simple Plugin Test",
    "A simple test plugin",
    "Your Name",
    "Your Name",
    "2024",
    "<Image>/Filters/Simple Test",  # Or any menu location
    "RGB*",
    [],  # <- your existing list of input values
    [],  # <- your missing list of returned values 
    simple_plugin,
)

    This said this is a deprecated registration usage, in more modern times you would use:

    #!/usr/bin/env python
from gimpfu import *

def simple_plugin(image, drawable):
    gimp.message("Simple plugin, working on %s in %s" % (drawable.name,image.name))

register(
    "simple-plugin",            # "python-fu" added by default anyway...
    "Simple Plugin Test",
    "A simple test plugin",
    "Your Name",
    "Your Name",
    "2025",
    "Simple Test",      # Just the menu item
    "RGB*,GRAY*",       # GRAY necessary if you want the plugin to also work on mask/Channels.
    [
        (PF_IMAGE,   'image',   'Input image',   None),   # Explicit input image (if necessary)
        (PF_DRAWABLE,'drawable','Input drawable',None),   # Explicit input drawable (if necessary)
    ],
    [],
    simple_plugin,
    menu="<Image>/Filters" # Menu location of menu item above
)

main()

    Where the two main differences are that: