Pyroman is a Roman numeral conversion library written for Python 3.6. Provided are the main library, unit tests, and a command line wrapper for the library. It can convert any integer number between 1 and 4,999 to a Roman numeral, or the same in reverse. Featuring dynamically generated lookup tables for a very fast execution.
The idea and source code for this project originally came from Dive Into Python 3 by Mark Pilgrim.
I have created a simple to use Gtk3 wrapper for use of the library without entering a Python shell or writing a script. Make sure roman_gui.py has execute permissions and run the executable directly.
The output mode setting controls the type of input accepted and the type returned. Numeral mode accepts an integer and returns a Roman numeral. Integer mode accepts a Roman numeral and returns an integer. Note that Roman numeral input must be uppercase. Integer input must be whole numbers, greater than 0 but less than 4,999.
- Error checking for input
- Exception handling and error output
- Basic program description in the main window
- Visual tweaks and enhancements
-> % python roman_test.py -v
test_blank (__main__.FromRomanBadInput)
from_roman should fail with blank string ... ok
test_malformed_antecedents (__main__.FromRomanBadInput)
from_roman should fail with malformed antecedents ... ok
test_repeated_pairs (__main__.FromRomanBadInput)
from_roman should fail with repeated pairs of numerals ... ok
test_too_many_repeated_numerals (__main__.FromRomanBadInput)
from_roman should fail with too many repeated numerals ... ok
test_roundtrip (__main__.RoundTripCheck)
from_roman(to_roman(n)) == n for all n ... ok
test_negative (__main__.ToRomanBadInput)
to_roman should fail with negative input ... ok
test_non_integer (__main__.ToRomanBadInput)
to_roman should fail with non-integer input ... ok
test_too_large (__main__.ToRomanBadInput)
to_roman should fail with large input ... ok
test_zero (__main__.ToRomanBadInput)
to_roman should fail with 0 input ... ok
test_from_roman_known_values (__main__.ToRomanGoodInput)
from_roman should give known result with known input ... ok
test_to_roman_known_values (__main__.ToRomanGoodInput)
to_roman should give known result with known input ... ok
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Ran 11 tests in 0.011s
OK