Fix flake8 error.

trident-project · May 20, 2020 · 7833170 · 7833170
1 parent 575717c
commit 7833170
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/trident/roman.py b/trident/roman.py
@@ -100,7 +100,7 @@ def from_roman(s):
     if not s:
         raise InvalidRomanNumeralError('Input can not be blank')
     if not romanNumeralPattern.search(s):
-        raise InvalidRomanNumeralError('Invalid Roman numeral: {s}'.format(s))
+        raise InvalidRomanNumeralError('Invalid Roman numeral: {0}'.format(s))
 
     result = 0
     index = 0