How to covert integers to roman numerals?

chaot · 03-14-2017, 01:52 PM

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.

jbacelar · 03-14-2017, 03:07 PM

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)

chaot · 03-14-2017, 04:06 PM

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!

DaleDe · 03-14-2017, 06:06 PM

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

chaot · 03-17-2017, 01:21 PM

@DaleDe Advantageously to know what all is possible.
BTW: "list-style" is shortcut for "list-style-type"!

HTML

Spoiler:

CSS (item + 4 subitems)

Spoiler:

List (test)

03-14-2017, 01:52 PM	#1
chaot Head of lunatic asylum Posts: 349 Karma: 77620 Join Date: Jun 2012 Location: UTC +1 Device: Tolino Vision 3HD	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 03:25 PM. Reason: trivia

03-14-2017, 04:06 PM	#3
chaot Head of lunatic asylum Posts: 349 Karma: 77620 Join Date: Jun 2012 Location: UTC +1 Device: Tolino Vision 3HD	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 11:30 AM. Reason: [strike] should be clear, it's code!

03-14-2017, 06:06 PM	#4
DaleDe Grand Sorcerer Posts: 11,470 Karma: 13095790 Join Date: Aug 2007 Location: Grass Valley, CA Device: EB 1150, EZ Reader, Literati, iPad 2 & Air 2, iPhone 7	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 06:10 PM.

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