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Avoid string operation on a None gauge_unit value #498

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Avoid string operation on a None gauge_unit value #498

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8dc1219
Fix the #497 bug
kvid May 2, 2026
5c40ad4
Check type of gauge_unit for a safer test
kvid May 2, 2026
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2 changes: 1 addition & 1 deletion src/wireviz/Harness.py
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Original file line number Diff line number Diff line change
Expand Up @@ -298,7 +298,7 @@ def create_graph(self) -> Graph:
html = []

awg_fmt = ""
if cable.show_equiv:
if cable.show_equiv and isinstance(cable.gauge_unit, str):
# Only convert units we actually know about, i.e. currently
# mm2 and awg --- other units _are_ technically allowed,
# and passed through as-is.
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