Fixed previous fixed error for tests

[Pablo1990]

I commit this same fix, but don't know why it didn't go through (even though I pushed it)...

[giuliapaci]

Hi Pablo,

I had made that change (adding a _) previously to fix a problem which occurs now if you try running the 1-channel projection. This is because calculate_projection now gives two outputs so the _ captures the "empty" one which is a None in the case of a single channel.

To replicate the error (attached), I opened a stack in Napari and then tried running Plugins -> epitools -> Projection(selective plane)

If you look in the tests, inside test_projection, test_calculate_projection has the same _ and that test passes. If you remove it, it fails. Not sure how to fix the linter without running again into this problem

[Pablo1990]

Hi Giulia,

Thanks for checking! We might have to use two different functions then or maybe and if-else? What do you think it would be better?

[alessandrofelder]

Not sure it's much nicer, but you could use some enumerating to handle both cases?
Something like (pseudocode for main.py):

viewer = napari.current_viewer()
projected_data = calculate_projections(...) # put all outputs into the same variable irrespective of how many there are
for i, projection in enumerate(projected_data):
		if projection is not None:
	        viewer.add_image(
	            data=projection,
	            name=f"Projection_ch{i}",
	            scale=image.scale,
	            translate=image.translate,
	            rotate=image.rotate,
	            plane=image.plane,
	            metadata=image.metadata,
	        ) 

[Pablo1990]

I don't know why it closed, I just reset the branch. Now, I've fixed the tests rather than touching the code. Tests are passing now.

[giuliapaci]

All looks good, I have tested with images and both projection (1 channel and 2 channel) work!