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Old 03-14-2017, 02:52 PM   #1
chaot
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How to covert integers to roman numerals?


I just don't know what exactly I really need!

Either
a) a python code (to install in Regex-Function and convert with S&R any marked text) - here I may ask you how I specify/mark just these incidences: id="toc.html">1<
or
b) a 'normal' regex
for to change integers to roman numerals.

So the expressions look:
Code:
<h4 class="roman" id="toc.html">1</h4>
I found this (and others), but can't deal with that.
Last edited by chaot; 03-14-2017 at 04:25 PM. Reason: trivia
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Old 03-14-2017, 04:07 PM   #2
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jbacelar 25-12-14 in: MobileRead Forums > E-Book Software > Calibre > Editor > regex-function convert roman numerals.

Quote:
What I use.

Arabic to Roman
Search (eg):
(>Chapter )(\d+)(<)

Regex-function:

Code:
def num_roman(input):
    ints = (1000, 900,  500, 400, 100,  90, 50,  40, 10,  9,   5,  4,   1)
    nums = ('M',  'CM', 'D', 'CD','C', 'XC','L','XL','X','IX','V','IV','I')
    result = ""
    input=int(input)
    for i in range(len(ints)):
        count = input//ints[i]
        result += nums[i] * count
        input -= ints[i] * count
    return result
def replace(match, number, file_name, metadata, dictionaries, data, functions, *args, **kwargs):
    return match.group(1)+str(num_roman(match.group(2)))+match.group(3)
Roman to Arabic
Search (eg):
(>Chapter )(.+?)(<)

Regex-function:

Code:
numeral_map = zip(
    (1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1),
    ('M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I')
)
	   
def arabic_num(n):
    n = unicode(n).upper()
    i = result = 0
    for integer, numeral in numeral_map:
        while n[i:i + len(numeral)] == numeral:
            result += integer
            i += len(numeral)
    return result
def replace(match, number, file_name, metadata, dictionaries, data, functions, *args, **kwargs):
    return match.group(1)+str(arabic_num(match.group(2)))+match.group(3)
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Old 03-14-2017, 05:06 PM   #3
chaot
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Important is to follow the instructions precisely (also with regard to the use of parentheses).
To convert integer 1 to I the search expression is (in my example) (html">)(\d+)(</h4>)

Reinforced by this sense of achievement I can go to bed now. very much!
Last edited by chaot; 03-15-2017 at 12:30 PM. Reason: [strike] should be clear, it's code!
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Old 03-14-2017, 07:06 PM   #4
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When you need to count in Roman numerals the following may help.
<style>
ol {list-style-type: upper-roman;}
ol ol {list-style-type: upper-alpha;}
ol ol ol {list-style-type: lower-roman;}
ol ol ol ol {list-style-type: lower-alpha;}
ol ol ol ol ol {list-style-type: decimal;}
ol ol ol ol ol ol {list-style-type: lower-alpha;}
</style>
Dale
Last edited by DaleDe; 03-14-2017 at 07:10 PM.
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Old 03-17-2017, 02:21 PM   #5
chaot
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@DaleDe Advantageously to know what all is possible.
BTW: "list-style" is shortcut for "list-style-type"!

HTML
Spoiler:
Code:
<body>

  <ol>

    <li>first item (upper roman)</li>

    <li>second item</li>

    <ol>

      <li>second item/1. sub (upper alpha)</li>

      <li>second item/2. sub</li>

      <li>second item/3. sub</li>

      <ol>

        <li>second item/3. sub/A (lower roman)</li>

        <li>second item/3. sub/B</li>

        <ol>

          <li>second item/3. sub/B/a (lower alpha)</li>

          <li>second item/3. sub/B/b</li>

          <li>second item/3. sub/B/c</li>

          <ol>

            <li>second item/3. sub/B/c/1 (decimal)</li>

            <li>second item/3. sub/B/c/2</li>

          </ol>

        </ol>

      </ol>

    </ol>

  </ol>

</body>


CSS (item + 4 subitems)
Spoiler:
Code:
  ol {
    list-style: upper-roman;
  }
  ol ol {
    list-style: upper-alpha;
  }
  ol ol ol {
    list-style: lower-roman;
  }
  ol ol ol ol {
    list-style: lower-alpha;
  }
  ol ol ol ol ol {
    list-style: decimal;
  }


Click image for larger version Name: List (test).png Views: 291 Size: 41.2 KB ID: 155706
List (test)
Last edited by chaot; 03-17-2017 at 02:29 PM. Reason: updating code & image
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