No equal sign in generated layer names (#867)

Co-authored-by: Jonathan Striebel <[email protected]>

Author: fm3

webknossos/Changelog.md

@@ -18,6 +18,7 @@ For upgrade instructions, please check the respective *Breaking Changes* section
 - Added `read_only` parameter for `annotation.temporary_volume_layer_copy`. [#866](https://github.com/scalableminds/webknossos-libs/pull/866)
 
 ### Changed
+- in Dataset.layer_from_images, layer names generated from multiple input image channels no longer contain equal signs, yielding better url safety. [#867](https://github.com/scalableminds/webknossos-libs/pull/867)
 
 ### Fixed
 - Fixed a bug where some czi, dm3, dm4 images could not be converted to wkw due to a too-strict check. [#865](https://github.com/scalableminds/webknossos-libs/pull/865)

webknossos/webknossos/dataset/dataset.py

@@ -1088,15 +1088,15 @@ def add_layer_from_images(
                 #    "timepoint": [0, 1],
                 # }
                 # suffix_with_pims_open_kwargs_per_layer = {
-                #    "__channel=0_timepoint=0", {"channel": 0, "timepoint": 0},
-                #    "__channel=0_timepoint=1", {"channel": 0, "timepoint": 1},
-                #    "__channel=0_timepoint=2", {"channel": 0, "timepoint": 2},
+                #    "__channel0_timepoint0", {"channel": 0, "timepoint": 0},
+                #    "__channel0_timepoint1", {"channel": 0, "timepoint": 1},
+                #    "__channel0_timepoint2", {"channel": 0, "timepoint": 2},
                 #    …,
-                #    "__channel=1_timepoint=0", {"channel": 1, "timepoint": 0},
+                #    "__channel1_timepoint0", {"channel": 1, "timepoint": 0},
                 #    …,
                 # }
                 suffix_with_pims_open_kwargs_per_layer = {
-                    "__" + "_".join(f"{k}={v}" for k, v in sorted(pairs)): dict(pairs)
+                    "__" + "_".join(f"{k}{v}" for k, v in sorted(pairs)): dict(pairs)
                     for pairs in product(
                         *(
                             [(key, value) for value in values]