One thought on “docutils: ImportError: No module named roman”

1. The module ‘ roman.py ‘ in … Python32\Lib\site-packages … when installed for Pyton 3x shows (4) Syntax errors concerning the ‘raise…’ command – which got new syntax in Python 3.x

   A copy of CORRECTED roman.py follows – after that it was possible to install it with Python 3.2.0.
   The docutils, however, are NOT suited / adopted for Pyton 3x new SYNTAX at all – they display MANY syntax errors with ‘raise’, ‘print’, … command !!

   [code lang="python"]"""Convert to and from Roman numerals"""

   __author__ = "Mark Pilgrim (f8dy@diveintopython.org)"
   __version__ = "1.4"
   __date__ = "8 August 2001"
   __copyright__ = """Copyright (c) 2001 Mark Pilgrim

   This program is part of "Dive Into Python", a free Python tutorial for
   experienced programmers. Visit http://diveintopython.org/ for the
   latest version.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the Python 2.1.1 license, available at
   http://www.python.org/2.1.1/license.html
   """

   import re

   #Define exceptions
   class RomanError(Exception): pass
   class OutOfRangeError(RomanError): pass
   class NotIntegerError(RomanError): pass
   class InvalidRomanNumeralError(RomanError): pass

   #Define digit mapping
   romanNumeralMap = (('M', 1000),
   ('CM', 900),
   ('D', 500),
   ('CD', 400),
   ('C', 100),
   ('XC', 90),
   ('L', 50),
   ('XL', 40),
   ('X', 10),
   ('IX', 9),
   ('V', 5),
   ('IV', 4),
   ('I', 1))

   def toRoman(n):
   """convert integer to Roman numeral"""
   if not (0 < n = integer:
   result += numeral
   n -= integer
   return result

   #Define pattern to detect valid Roman numerals
   romanNumeralPattern = re.compile("""
   ^ # beginning of string
   M{0,4} # thousands - 0 to 4 M's
   (CM|CD|D?C{0,3}) # hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 C's),
   # or 500-800 (D, followed by 0 to 3 C's)
   (XC|XL|L?X{0,3}) # tens - 90 (XC), 40 (XL), 0-30 (0 to 3 X's),
   # or 50-80 (L, followed by 0 to 3 X's)
   (IX|IV|V?I{0,3}) # ones - 9 (IX), 4 (IV), 0-3 (0 to 3 I's),
   # or 5-8 (V, followed by 0 to 3 I's)
   $ # end of string
   """ ,re.VERBOSE)

   def fromRoman(s):
   """convert Roman numeral to integer"""
   if not s:
   # ... raise InvalidRomanNumeralError, 'Input can not be blank'
   raise InvalidRomanNumeralError( 'Input can not be blank' )
   if not romanNumeralPattern.search(s):
   # ... raise InvalidRomanNumeralError, 'Invalid Roman numeral: %s' % s
   raise InvalidRomanNumeralError( 'Invalid Roman numeral: %s' % s )

   result = 0
   index = 0
   for numeral, integer in romanNumeralMap:
   while s[index:index+len(numeral)] == numeral:
   result += integer
   index += len(numeral)
   return result
   [/code]