+ def _update_conversion(self):
+ assert self._categoryName
+ assert self._inputUnitName
+ assert self._outputUnitName
+
+ userInput = str(self._inputUnitValue.text())
+ value = self._sanitize_value(userInput)
+
+ unitData = unit_data.UNIT_DESCRIPTIONS[self._categoryName]
+ inputConversion, _, _ = unitData[self._inputUnitName]
+ outputConversion, _, _ = unitData[self._outputUnitName]
+
+ func, arg = inputConversion
+ base = func.to_base(value, arg)
+
+ func, arg = outputConversion
+ newValue = func.from_base(base, arg)
+ self._outputUnitValue.setText(str(newValue))
+