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Coding workflows · Canonical Roman numerals
03
A concrete starting point
Format an integer from 1 through 3999 as a canonical uppercase Roman numeral. Check subtractive forms such as 4 and 900, rejecting zero, out-of-range numbers and non-integers.
Define the change
Describe the input, expected output and boundaries that must stay intact.
Inspect the work
Review the proposed edits and any commands before relying on their result.
Check the outcome
Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.
Canonical Roman numerals
A concrete starting point
def roman_numeral(n):
if type(n) is not int or not 1 <= n <= 3999:
raise ValueError("roman.range")
values = [(1000,"M"),(900,"CM"),(500,"D"),(400,"CD"),
(100,"C"),(90,"XC"),(50,"L"),(40,"XL"),
(10,"X"),(9,"IX"),(5,"V"),(4,"IV"),(1,"I")]
parts = []
for value, symbol in values:
count, n = divmod(n, value)
parts.append(symbol * count)
return "".join(parts)The example is a starting point for a real project, not a claim that generated code is already tested. Adjust paths, dependencies and expected behavior to match your application.