update 0.1.5

Author: Dylan

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = unit_parse
-version = 0.1.4
+version = 0.1.5
 description = Parse units from strings. From mess to order!
 long_description = file: README.md
 long_description_content_type = text/markdown

src/unit_parse/utils.py

@@ -32,6 +32,11 @@ def quantity_difference(quantity1: Quantity, quantity2: Quantity) -> Union[int,
             quantity1.dimensionality != quantity2.dimensionality:
         return 1
 
+    if quantity2.to_base_units().m == 0:  # avoid divide by zero error
+        if quantity1.to_base_units().m == 0:
+            return True
+        return False
+
     return abs((quantity1 - quantity2) / quantity2)