read extruder_colour in connect metadata

.gitignore

@@ -8,3 +8,4 @@ dist/
 Testing
 .py-build*
 __pycache__
+venv

pybgcode/pybgcode/__init__.py

@@ -144,14 +144,14 @@ def read_metadata(gcodefile: FILEWrapper, type: str = 'printer'):
     "support_material", "ironing", "quiet_percent_present",
     "quiet_left_present", "quiet_change_in_present", "normal_percent_present",
     "normal_left_present", "normal_change_in_present", "layer_info_present",
-    "max_layer_z", "objects_info"]
+    "max_layer_z", "objects_info", "extruder_colour"]
 
 
 def filter_connect_metadata(output: dict) -> dict:
     all_metadata = {**output['print'], **output['printer']}
     connect_metadata = {
         key: item for key, item in all_metadata.items()
-        if key in connect_metadata_keys}
+        if (key in connect_metadata_keys and item != '""')}
     return {'thumbnails': output['thumbnails'], 'metadata': connect_metadata}
 
 

pybgcode/tests/test_convert.py

@@ -86,6 +86,8 @@ def test_main():
     assert len(slicer_metadata) == TEST_LEN_SLICER_METADATA
 
     all_metadata = read_connect_metadata(thumb_f)
+    # ; extruder_colour = "" filtered out
+    assert 'extruder_colour' not in all_metadata['metadata']
     assert len(all_metadata['thumbnails']) == TEST_THUMBNAILS
     for key in all_metadata['metadata'].keys():
         assert key in connect_metadata_keys