... representation of 266 6. This matches the start of the string, then four out of four M characters, then D?C{0,3} with a D and three out of three C characters; then L?X{0,3} with an L and three out ... Characters are additive. I is 1, II is 2, and III is 3. VI is 6 (literally, “5 and 1”), VII is 7, and VIII is 8. The tens characters (I, X, C, and M) can be repeated up to three times. At ... same technique. The next example shows the regular expression for handling phone numbers without separators. Example 7.13. Handling Numbers Without Separators >>> phonePattern = re.compile(r'^(\d{3})\D*(\d{3})\D*(\d{4})\D*(\d*)$')...